Merge branch 'master' of gitlab.com:genenetwork/guix-bioinformatics

1 files changed, 8426 insertions, 0 deletions

diff --git a/gn/packages/crates-io.scm b/gn/packages/crates-io.scm
new file mode 100644
index 0000000..abc69d9
--- /dev/null
+++ b/gn/packages/crates-io.scm
@@ -0,0 +1,8426 @@
+(define-module (gn packages crates-io)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (gnu packages)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix utils)
+  #:use-module (guix build-system cargo)
+  #:use-module (gnu packages crates-io))
+
+;; Please keep these packages sorted alphabetically
+
+(define-public rust-addr2line
+  (package
+    (name "rust-addr2line")
+    (version "0.10.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "addr2line" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1daaxrzk6fmfzaqi06y704hcw0rjz199l0n9214ybfm3m3jnmc4m"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-cpp-demangle" ,rust-cpp-demangle)
+        ("rust-fallible-iterator"
+         ,rust-fallible-iterator)
+        ("rust-gimli" ,rust-gimli)
+        ("rust-intervaltree" ,rust-intervaltree)
+        ("rust-lazycell" ,rust-lazycell)
+        ("rust-object" ,rust-object)
+        ("rust-rustc-demangle" ,rust-rustc-demangle)
+        ("rust-smallvec" ,rust-smallvec))
+       #:cargo-development-inputs
+       (("rust-backtrace" ,rust-backtrace)
+        ("rust-clap" ,rust-clap)
+        ("rust-findshlibs" ,rust-findshlibs)
+        ("rust-memmap" ,rust-memmap)
+        ("rust-rustc-test" ,rust-rustc-test))))
+    (home-page "https://github.com/gimli-rs/addr2line")
+    (synopsis
+      "A cross-platform symbolication library written in Rust, using `gimli`")
+    (description
+      "This package provides a cross-platform symbolication library written in Rust, using `gimli`")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-afl
+  (package
+    (name "rust-afl")
+    (version "0.4.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "afl" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0g2chc18ji7qxi0d03n2ai140qdcww958v5si6rcjnnhmri1vyfb"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-cc" ,rust-cc)
+        ("rust-clap" ,rust-clap)
+        ("rust-rustc-version" ,rust-rustc-version)
+        ("rust-xdg" ,rust-xdg))
+       #:cargo-development-inputs
+       (("rust-rustc-version" ,rust-rustc-version)
+        ("rust-xdg" ,rust-xdg))))
+    (home-page "https://github.com/rust-fuzz/afl.rs")
+    (synopsis
+      "Fuzzing Rust code with american-fuzzy-lop")
+    (description
+      "Fuzzing Rust code with american-fuzzy-lop")
+    (license license:asl2.0)))
+
+(define-public rust-aho-corasick
+  (package
+    (name "rust-aho-corasick")
+    (version "0.7.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "aho-corasick" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "10p2yl9fz7a4zwc4kj4zpk0wcz64n4m5l0ng6zsa6zkxrcfamdrn"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-memchr" ,rust-memchr))
+       #:cargo-development-inputs
+       (("rust-doc-comment" ,rust-doc-comment))))
+    (home-page "https://github.com/BurntSushi/aho-corasick")
+    (synopsis "Fast multiple substring searching.")
+    (description
+      "Fast multiple substring searching.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-ansi-term
+  (package
+    (name "rust-ansi-term")
+    (version "0.12.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "ansi_term" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0dmvziqx1j06xbv3zx62k7w81dyaqviag1rk5a0iynjqqdk2g9za"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-serde" ,rust-serde)
+        ("rust-winapi" ,rust-winapi))
+       #:cargo-development-inputs
+       (("rust-doc-comment" ,rust-doc-comment)
+        ("rust-serde-json" ,rust-serde-json))))
+    (home-page "https://github.com/ogham/rust-ansi-term")
+    (synopsis
+      "Library for ANSI terminal colours and styles (bold, underline)")
+    (description
+      "Library for ANSI terminal colours and styles (bold, underline)")
+    (license license:expat)))
+
+(define-public rust-ansi-term-0.11
+  (package
+    (inherit rust-ansi-term)
+    (name "rust-ansi-term")
+    (version "0.11.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "ansi_term" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "16wpvrghvd0353584i1idnsgm0r3vchg8fyrm0x8ayv1rgvbljgf"))))
+    (arguments
+      `(#:cargo-inputs
+        (("rust-winapi" ,rust-winapi))))))
+
+(define-public rust-arrayvec
+  (package
+    (name "rust-arrayvec")
+    (version "0.4.11")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "arrayvec" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1fmhq4ljxr954mdyazaqa9kdxryl5d2ggr5rialylrd6xndkzmxq"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-nodrop" ,rust-nodrop)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-bencher" ,rust-bencher)
+         ("rust-matches" ,rust-matches)
+         ("rust-serde-test" ,rust-serde-test))))
+    (home-page "https://github.com/bluss/arrayvec")
+    (synopsis
+      "A vector with fixed capacity, backed by an array (it can be stored on the stack too). Implements fixed capacity ArrayVec and ArrayString.")
+    (description
+      "This package provides a vector with fixed capacity, backed by an array (it can be stored on the stack too).  Implements fixed capacity ArrayVec and ArrayString.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-ascii
+  (package
+    (name "rust-ascii")
+    (version "0.9.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "ascii" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1mn5az4hkxgjhwy157pr1nrfdb3qjpw8jw8v91m2i8wg59b21qwi"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-quickcheck" ,rust-quickcheck)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-test" ,rust-serde-test))))
+    (home-page
+      "https://github.com/tomprogrammer/rust-ascii")
+    (synopsis
+      "ASCII-only equivalents to `char`, `str` and `String`.")
+    (description
+      "ASCII-only equivalents to `char`, `str` and `String`.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-atlatl
+  (package
+    (name "rust-atlatl")
+    (version "0.1.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "atlatl" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "18kyvdm56fdb52b1sryi80xgs3nkjdylynsv324aiqnj85l1bfrj"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-fnv" ,rust-fnv)
+         ("rust-num-traits" ,rust-num-traits)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-fst" ,rust-fst)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-quickcheck" ,rust-quickcheck)
+         ("rust-rand" ,rust-rand))))
+    (home-page
+      "https://github.com/tapeinosyne/atlatl")
+    (synopsis "Double-array tries.")
+    (description "Double-array tries.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-atty
+  (package
+    (name "rust-atty")
+    (version "0.2.13")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "atty" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "140sswp1bwqwc4zk80bxkbnfb3g936hgrb77g9g0k1zcld3wc0qq"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-libc" ,rust-libc)
+         ("rust-winapi" ,rust-winapi))))
+    (home-page "https://github.com/softprops/atty")
+    (synopsis "A simple interface for querying atty")
+    (description
+      "This package provides a simple interface for querying atty")
+    (license license:expat)))
+
+(define-public rust-autocfg ; guix upstreamable
+  (package
+    (name "rust-autocfg")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "autocfg" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0asl6fnc35yk5l2rxwhp25v128jgm45dp754h9z8x51b6n90w4r2"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/cuviper/autocfg")
+    (synopsis "Automatic cfg for Rust compiler features")
+    (description "Rust library for build scripts to automatically configure
+code based on compiler support.  Code snippets are dynamically tested to see
+if the @code{rustc} will accept them, rather than hard-coding specific version
+support.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-automod
+  (package
+    (name "rust-automod")
+    (version "0.1.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "automod" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0pld582piq2d55z0j96zcs8izw3ml46f8h9y7sdyxg093yfvxl2h"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-proc-macro2" ,rust-proc-macro2)
+        ("rust-quote" ,rust-quote)
+        ("rust-syn" ,rust-syn))))
+    (home-page "https://github.com/dtolnay/automod")
+    (synopsis "Pull in every source file in a directory as a module.")
+    (description
+      "Pull in every source file in a directory as a module.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-average
+  (package
+    (name "rust-average")
+    (version "0.10.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "average" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "077wbjzn2hwdjnglp8pjvirvsjgfgbgnlirwh5g2hk14xqx7f57l"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-conv" ,rust-conv)
+         ("rust-float-ord" ,rust-float-ord)
+         ("rust-num-traits" ,rust-num-traits)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-big-array" ,rust-serde-big-array)
+         ("rust-serde-derive" ,rust-serde-derive))
+        #:cargo-development-inputs
+        (("rust-bencher" ,rust-bencher)
+         ("rust-proptest" ,rust-proptest)
+         ("rust-quantiles" ,rust-quantiles)
+         ("rust-rand" ,rust-rand)
+         ("rust-rand-distr" ,rust-rand-distr)
+         ("rust-rand-xoshiro" ,rust-rand-xoshiro)
+         ("rust-serde-json" ,rust-serde-json)
+         ("rust-streaming-stats" ,rust-streaming-stats))))
+    (home-page "https://github.com/vks/average")
+    (synopsis "Calculate statistics iteratively")
+    (description "Calculate statistics iteratively")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-average-0.9
+  (package
+    (inherit rust-average)
+    (name "rust-average")
+    (version "0.9.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "average" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1f8ya00bv6qki9m7b4lb3bn845rj473mx02qpm7wgy5qc1yp75xs"))))
+    (arguments
+      `(#:cargo-inputs
+        (("rust-conv" ,rust-conv)
+         ("rust-float-ord" ,rust-float-ord)
+         ("rust-num-integer" ,rust-num-integer)
+         ("rust-num-traits" ,rust-num-traits)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-big-array" ,rust-serde-big-array)
+         ("rust-serde-derive" ,rust-serde-derive))
+        #:cargo-development-inputs
+        (("rust-bencher" ,rust-bencher)
+         ("rust-quantiles" ,rust-quantiles)
+         ("rust-rand" ,rust-rand-0.6)
+         ("rust-serde-json" ,rust-serde-json)
+         ("rust-streaming-stats" ,rust-streaming-stats))))))
+
+(define-public rust-backtrace
+  (package
+    (name "rust-backtrace")
+    (version "0.3.33")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "backtrace" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1iiinw3c494lz8xb823ccl9zwifka9zsg44734wsd3xgr6dngyw8"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-addr2line" ,rust-addr2line)
+         ("rust-backtrace-sys" ,rust-backtrace-sys)
+         ("rust-cfg-if" ,rust-cfg-if)
+         ("rust-compiler-builtins"
+          ,rust-compiler-builtins)
+         ("rust-cpp-demangle" ,rust-cpp-demangle)
+         ("rust-findshlibs" ,rust-findshlibs)
+         ("rust-goblin" ,rust-goblin)
+         ("rust-goblin" ,rust-goblin)
+         ("rust-goblin" ,rust-goblin)
+         ("rust-goblin" ,rust-goblin)
+         ("rust-libc" ,rust-libc)
+         ("rust-memmap" ,rust-memmap)
+         ("rust-rustc-demangle" ,rust-rustc-demangle)
+         ("rust-rustc-serialize" ,rust-rustc-serialize)
+         ("rust-rustc-std-workspace-core"
+          ,rust-rustc-std-workspace-core)
+         ("rust-serde" ,rust-serde)
+         ("rust-winapi" ,rust-winapi))))
+    (home-page
+      "https://github.com/rust-lang/backtrace-rs")
+    (synopsis
+      "A library to acquire a stack trace (backtrace) at runtime in a Rust program.")
+    (description
+      "This package provides a library to acquire a stack trace (backtrace) at runtime in a Rust program.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-backtrace-sys
+  (package
+    (name "rust-backtrace-sys")
+    (version "0.1.31")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "backtrace-sys" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0as2pk77br4br04daywhivpi1ixxb8y2c7f726kj849dxys31a42"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-compiler-builtins"
+          ,rust-compiler-builtins)
+         ("rust-libc" ,rust-libc)
+         ("rust-rustc-std-workspace-core"
+          ,rust-rustc-std-workspace-core))
+        #:cargo-development-inputs
+        (("rust-cc" ,rust-cc))))
+    (home-page
+      "https://github.com/alexcrichton/backtrace-rs")
+    (synopsis
+      "Bindings to the libbacktrace gcc library")
+    (description
+      "Bindings to the libbacktrace gcc library")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-base-x
+  (package
+    (name "rust-base-x")
+    (version "0.2.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "base-x" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0hv4y5cdhv6bk0ghk2434clw8v4mmk5cc9lsh6qrpri92zlfmx3n"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-bencher" ,rust-bencher)
+         ("rust-json" ,rust-json)
+         ("rust-rand" ,rust-rand))))
+    (home-page "https://github.com/OrKoN/base-x-rs")
+    (synopsis "Encode/decode any base")
+    (description "Encode/decode any base")
+    (license license:expat)))
+
+(define-public rust-base64
+  (package
+    (name "rust-base64")
+    (version "0.10.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "base64" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "13k6bvd3n6dm7jqn9x918w65dd9xhx454bqphbnv0bkd6n9dj98b"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-byteorder" ,rust-byteorder))
+        #:cargo-development-inputs
+        (("rust-criterion" ,rust-criterion)
+         ("rust-rand" ,rust-rand))))
+    (home-page
+      "https://github.com/alicemaz/rust-base64")
+    (synopsis
+      "encodes and decodes base64 as bytes or utf8")
+    (description
+      "encodes and decodes base64 as bytes or utf8")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-bencher ; guix upstreamable
+  (package
+    (name "rust-bencher")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "bencher" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1x8p2xblgqssay8cdykp5pkfc0np0jk5bs5cx4f5av097aav9zbx"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/bluss/bencher/")
+    (synopsis "Port of the libtest benchmark runner to Rust stable")
+    (description "This package provides a port of the libtest (unstable Rust)
+benchmark runner to Rust stable releases.  Supports running benchmarks and
+filtering based on the name.  Benchmark execution works exactly the same way
+and no more (caveat: black_box is still missing!).")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-bincode
+  (package
+    (name "rust-bincode")
+    (version "1.1.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "bincode" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1xx6bp39irvsndk6prnmmq8m1l9p6q2qj21j6mfks2y81pjsa14z"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-autocfg" ,rust-autocfg)
+         ("rust-byteorder" ,rust-byteorder)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-serde-bytes" ,rust-serde-bytes)
+         ("rust-serde-derive" ,rust-serde-derive))))
+    (home-page "https://github.com/TyOverby/bincode")
+    (synopsis
+      "A binary serialization / deserialization strategy that uses Serde for transforming structs into bytes and vice versa!")
+    (description
+      "This package provides a binary serialization / deserialization strategy that uses Serde for transforming structs into bytes and vice versa!")
+    (license license:expat)))
+
+(define-public rust-bindgen
+  (package
+    (name "rust-bindgen")
+    (version "0.50.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "bindgen" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1k4n1d002vrfn1mlpww3ib7f275yn4rpxfwkqpr9bym27zg17ab5"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bitflags" ,rust-bitflags)
+         ("rust-cexpr" ,rust-cexpr)
+         ("rust-cfg-if" ,rust-cfg-if)
+         ("rust-clang-sys" ,rust-clang-sys)
+         ("rust-clap" ,rust-clap)
+         ("rust-env-logger" ,rust-env-logger)
+         ("rust-fxhash" ,rust-fxhash)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-log" ,rust-log)
+         ("rust-peeking-take-while"
+          ,rust-peeking-take-while)
+         ("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-regex" ,rust-regex)
+         ("rust-shlex" ,rust-shlex)
+         ("rust-which" ,rust-which))
+        #:cargo-development-inputs
+        (("rust-clap" ,rust-clap)
+         ("rust-diff" ,rust-diff)
+         ("rust-shlex" ,rust-shlex))))
+    (home-page
+      "https://rust-lang.github.io/rust-bindgen/")
+    (synopsis
+      "Automatically generates Rust FFI bindings to C and C++ libraries.")
+    (description
+      "Automatically generates Rust FFI bindings to C and C++ libraries.")
+    (license license:bsd-3)))
+
+(define-public rust-bit-set
+  (package
+    (name "rust-bit-set")
+    (version "0.5.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "bit-set" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "100ac8867bvbx9kv634w4xjk98b71i8nq4wdcvpf3cf4ha4j6k78"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bit-vec" ,rust-bit-vec))
+        #:cargo-development-inputs
+        (("rust-rand" ,rust-rand))))
+    (home-page
+      "https://github.com/contain-rs/bit-set")
+    (synopsis "A set of bits")
+    (description
+      "This package provides a set of bits")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-bitflags ; guix upstreamable
+  (package
+    (name "rust-bitflags")
+    (version "1.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "bitflags" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1zc1qb1hwsnl2d8rhzicsv9kqd5b2hwbrscrcfw5as4sfr35659x"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/bitflags/bitflags")
+    (synopsis "Macro to generate structures which behave like bitflags")
+    (description "This package provides a macro to generate structures which
+behave like a set of bitflags.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-blobby
+  (package
+    (name "rust-blobby")
+    (version "0.1.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "blobby" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1xicpf3s2mi5xqnx8ps5mdych4ib5nh2nfsbrsg8ar8bjk1girbg"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-byteorder" ,rust-byteorder))
+        #:cargo-development-inputs
+        (("rust-byteorder" ,rust-byteorder)
+         ("rust-hex" ,rust-hex))))
+    (home-page "https://github.com/RustCrypto/utils")
+    (synopsis
+      "Iterator over simple binary blob storage")
+    (description
+      "Iterator over simple binary blob storage")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-bumpalo
+  (package
+    (name "rust-bumpalo")
+    (version "2.5.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "bumpalo" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "018b5calz3895v04shk9bn7i73r4zf8yf7p1dqg92s3xya13vm1c"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-criterion" ,rust-criterion)
+         ("rust-quickcheck" ,rust-quickcheck))))
+    (home-page "https://github.com/fitzgen/bumpalo")
+    (synopsis
+      "A fast bump allocation arena for Rust.")
+    (description
+      "This package provides a fast bump allocation arena for Rust.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-byteorder
+  (package
+    (name "rust-byteorder")
+    (version "1.3.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "byteorder" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1xbwjlmq2ziqjmjvkqxdx1yh136xxhilxd40bky1w4d7hn4xvhx7"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-doc-comment" ,rust-doc-comment)
+         ("rust-quickcheck" ,rust-quickcheck)
+         ("rust-rand" ,rust-rand))))
+    (home-page
+      "https://github.com/BurntSushi/byteorder")
+    (synopsis
+      "Library for reading/writing numbers in big-endian and little-endian.")
+    (description
+      "Library for reading/writing numbers in big-endian and little-endian.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-bytes
+  (package
+    (name "rust-bytes")
+    (version "0.4.12")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "bytes" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0768a55q2fsqdjsvcv98ndg9dq7w2g44dvq1avhwpxrdzbydyvr0"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-byteorder" ,rust-byteorder)
+         ("rust-either" ,rust-either)
+         ("rust-iovec" ,rust-iovec)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-serde-test" ,rust-serde-test))))
+    (home-page "https://github.com/carllerche/bytes")
+    (synopsis
+      "Types and traits for working with bytes")
+    (description
+      "Types and traits for working with bytes")
+    (license license:expat)))
+
+(define-public rust-c2-chacha
+  (package
+    (name "rust-c2-chacha")
+    (version "0.2.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "c2-chacha" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "00a11qdc8mg3z0k613rhprkc9p6xz0y7b1681x32ixg0hr3x0r3x"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-byteorder" ,rust-byteorder)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-ppv-lite86" ,rust-ppv-lite86)
+         ("rust-stream-cipher" ,rust-stream-cipher))
+        #:cargo-development-inputs
+        (("rust-hex-literal" ,rust-hex-literal))))
+    (home-page
+      "https://github.com/cryptocorrosion/cryptocorrosion")
+    (synopsis "The ChaCha family of stream ciphers")
+    (description
+      "The ChaCha family of stream ciphers")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-cc
+  (package
+    (name "rust-cc")
+    (version "1.0.38")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "cc" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0imzcz53wg7m3gr6657yrikp7icyc2bpkvssnyd0xvj8imihqh6f"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-rayon" ,rust-rayon))
+       #:cargo-development-inputs
+       (("rust-tempdir" ,rust-tempdir))
+       #:tests? #f)) ; tests fail
+    (home-page
+      "https://github.com/alexcrichton/cc-rs")
+    (synopsis
+      "A build-time dependency for Cargo build scripts to assist in invoking the native
+      C compiler to compile native C code into a static archive to be linked into Rust
+      code.")
+    (description
+      "This package provides a build-time dependency for Cargo build scripts to assist in invoking the native
+      C compiler to compile native C code into a static archive to be linked into Rustcode.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-cexpr
+  (package
+    (name "rust-cexpr")
+    (version "0.3.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "cexpr" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1by64ini3f058pwad3immx5cc12wr0m0kwgaxa8apzym03mj9ym7"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-nom" ,rust-nom))
+        #:cargo-development-inputs
+        (("rust-clang-sys" ,rust-clang-sys))))
+    (home-page
+      "https://github.com/jethrogb/rust-cexpr")
+    (synopsis "A C expression parser and evaluator")
+    (description
+      "This package provides a C expression parser and evaluator")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-cfg-if ; guix upstreamable
+  (package
+    (name "rust-cfg-if")
+    (version "0.1.9")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "cfg-if" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0csygklgz3ybpr0670rkip49zh76m43ar3k7xgypkzbzrwycx1ml"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/alexcrichton/cfg-if")
+    (synopsis "Define an item depending on parameters")
+    (description "This package provides a macro to ergonomically define an item
+depending on a large number of #[cfg] parameters.  Structured like an
+@code{if-else} chain, the first matching branch is the item that gets emitted.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-chrono
+  (package
+    (name "rust-chrono")
+    (version "0.4.7")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "chrono" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1glam3iqhshbamzgf0npn7hgghski92r31lm7gg8841hnxc1zn3p"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-libc" ,rust-libc)
+         ("rust-num-integer" ,rust-num-integer)
+         ("rust-num-traits" ,rust-num-traits)
+         ("rust-rustc-serialize" ,rust-rustc-serialize)
+         ("rust-serde" ,rust-serde)
+         ("rust-time" ,rust-time))
+        #:cargo-development-inputs
+        (("rust-bincode" ,rust-bincode)
+         ("rust-doc-comment" ,rust-doc-comment)
+         ("rust-num-iter" ,rust-num-iter)
+         ("rust-serde-derive" ,rust-serde-derive)
+         ("rust-serde-json" ,rust-serde-json))))
+    (home-page
+      "https://github.com/chronotope/chrono")
+    (synopsis "Date and time library for Rust")
+    (description "Date and time library for Rust")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-ci-info
+  (package
+    (name "rust-ci-info")
+    (version "0.7.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "ci_info" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "01n3gxmwp765m6xg1fl8v1y12wsvbqvlcai27kdr5d2skrijyfb7"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-envmnt" ,rust-envmnt)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive))))
+    (home-page
+      "http://github.com/sagiegurari/ci_info")
+    (synopsis
+      "Provides current CI environment information.")
+    (description
+      "Provides current CI environment information.")
+    (license license:asl2.0)))
+
+(define-public rust-clang-sys
+  (package
+    (name "rust-clang-sys")
+    (version "0.28.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "clang-sys" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0m8h56yjwv19pbah4lrhmb8js9mhx6hi5gk0y4zzix89xjf2c9s2"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-glob" ,rust-glob-0.2)
+         ("rust-libc" ,rust-libc)
+         ("rust-libloading" ,rust-libloading))
+        #:cargo-development-inputs
+        (("rust-glob" ,rust-glob))
+        #:phases
+        (modify-phases %standard-phases
+          (add-after 'unpack 'set-environmental-variable
+            (lambda* (#:key inputs #:allow-other-keys)
+              (let ((clang (assoc-ref inputs "libclang")))
+                (setenv "LIBCLANG_PATH"
+                        (string-append clang "/lib")))
+              #t)))))
+    (inputs
+     `(("libclang" ,(@ (gnu packages llvm) clang))))
+    (home-page
+      "https://github.com/KyleMayes/clang-sys")
+    (synopsis "Rust bindings for libclang.")
+    (description "Rust bindings for libclang.")
+    (license license:asl2.0)))
+
+(define-public rust-clap
+  (package
+    (name "rust-clap")
+    (version "2.33.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "clap" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1nf6ld3bims1n5vfzhkvcb55pdzh04bbhzf8nil5vvw05nxzarsh"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-ansi-term" ,rust-ansi-term-0.11)
+         ("rust-atty" ,rust-atty)
+         ("rust-bitflags" ,rust-bitflags)
+         ("rust-clippy" ,rust-clippy)
+         ("rust-strsim" ,rust-strsim-0.8)
+         ("rust-term-size" ,rust-term-size)
+         ("rust-textwrap" ,rust-textwrap)
+         ("rust-unicode-width" ,rust-unicode-width)
+         ("rust-vec-map" ,rust-vec-map)
+         ("rust-yaml-rust" ,rust-yaml-rust))
+        #:cargo-development-inputs
+        (("rust-lazy-static" ,rust-lazy-static)
+         ("rust-regex" ,rust-regex)
+         ("rust-version-sync" ,rust-version-sync))))
+    (home-page "https://clap.rs/")
+    (synopsis
+      "A simple to use, efficient, and full-featured Command Line Argument Parser")
+    (description
+      "This package provides a simple to use, efficient, and full-featured Command Line Argument Parser")
+    (license license:expat)))
+
+(define-public rust-clicolors-control
+  (package
+    (name "rust-clicolors-control")
+    (version "1.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "clicolors-control" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1y80cgarxhrd1bz5yjm81r444v6flvy36aaxrrsac0yhfd6gvavk"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-atty" ,rust-atty)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-libc" ,rust-libc)
+         ("rust-winapi" ,rust-winapi))))
+    (home-page
+      "https://github.com/mitsuhiko/clicolors-control")
+    (synopsis
+      "A common utility library to control CLI colorization")
+    (description
+      "This package provides a common utility library to control CLI colorization")
+    (license license:expat)))
+
+(define-public rust-clippy
+  (package
+    (name "rust-clippy")
+    (version "0.0.302")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "clippy" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1562x3sq9mgmc8j39gd34wqm7ybrdvpmj7cc1n450gwsawayw4fr"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-term" ,rust-term))))
+    (home-page
+      "https://github.com/rust-lang-nursery/rust-clippy")
+    (synopsis
+      "A bunch of helpful lints to avoid common pitfalls in Rust.")
+    (description
+      "This package provides a bunch of helpful lints to avoid common pitfalls in Rust.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-cloudabi
+  (package
+    (name "rust-cloudabi")
+    (version "0.0.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "cloudabi" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0kxcg83jlihy0phnd2g8c2c303px3l2p3pkjz357ll6llnd5pz6x"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bitflags" ,rust-bitflags))))
+    (home-page "https://nuxi.nl/cloudabi/")
+    (synopsis
+      "Low level interface to CloudABI. Contains all syscalls and related types.")
+    (description
+      "Low level interface to CloudABI.  Contains all syscalls and related types.")
+    (license license:bsd-2)))
+
+(define-public rust-cmake
+  (package
+    (name "rust-cmake")
+    (version "0.1.40")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "cmake" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1w0zgqdbbhl9w6px7avc6d5p43clglrmjfdn2n26mdsli5n3i91c"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs (("rust-cc" ,rust-cc))))
+    (home-page
+      "https://github.com/alexcrichton/cmake-rs")
+    (synopsis
+      "A build dependency for running `cmake` to build a native library")
+    (description
+      "This package provides a build dependency for running `cmake` to build a native library")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-compiler-builtins
+  (package
+    (name "rust-compiler-builtins")
+    (version "0.1.19")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "compiler_builtins" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1fpabpmg8paj4r5a37vmidh1jx1b7a6ilxm4s3xsxczx27ybjcjf"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-rustc-std-workspace-core"
+          ,rust-rustc-std-workspace-core))
+        #:cargo-development-inputs
+        (("rust-cc" ,rust-cc))))
+    (home-page
+      "https://github.com/rust-lang-nursery/compiler-builtins")
+    (synopsis
+      "Compiler intrinsics used by the Rust compiler. Also available for other targets if necessary!")
+    (description
+      "Compiler intrinsics used by the Rust compiler.  Also available for other targets if necessary!")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-console
+  (package
+    (name "rust-console")
+    (version "0.7.7")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "console" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0a4n2syzik9lh02v2i4wdazvm05d99bib7dw0lqvz8mq2hn7r9cc"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-atty" ,rust-atty)
+         ("rust-clicolors-control"
+          ,rust-clicolors-control)
+         ("rust-encode-unicode" ,rust-encode-unicode)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-libc" ,rust-libc)
+         ("rust-parking-lot" ,rust-parking-lot)
+         ("rust-regex" ,rust-regex)
+         ("rust-termios" ,rust-termios)
+         ("rust-unicode-width" ,rust-unicode-width)
+         ("rust-winapi" ,rust-winapi))))
+    (home-page
+      "https://github.com/mitsuhiko/console")
+    (synopsis
+      "A terminal and console abstraction for Rust")
+    (description
+      "This package provides a terminal and console abstraction for Rust")
+    (license license:expat)))
+
+(define-public rust-conv
+  (package
+    (name "rust-conv")
+    (version "0.3.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "conv" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "168j1npqrif1yqxbgbk0pdrx9shzhs5ylc5a4xw49b6hbxi11zvq"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-custom-derive" ,rust-custom-derive))
+        #:cargo-development-inputs
+        (("rust-quickcheck" ,rust-quickcheck)
+         ("rust-winapi" ,rust-winapi))))
+    (home-page
+      "https://github.com/DanielKeep/rust-conv")
+    (synopsis
+      "This crate provides a number of conversion traits with more specific semantics than those provided by 'as' or 'From'/'Into'.")
+    (description
+      "This crate provides a number of conversion traits with more specific semantics than those provided by 'as' or 'From'/'Into'.")
+    (license license:expat)))
+
+(define-public rust-core-arch
+  (package
+    (name "rust-core-arch")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "core_arch" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "04vdvr9vj0f1cv2p54nsszmrrk9w1js4c0z4i0bdlajl1lydslim"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-wasm-bindgen-test"
+          ,rust-wasm-bindgen-test))))
+    (home-page
+      "https://github.com/rust-lang-nursery/stdsimd")
+    (synopsis
+      "`core::arch` - Rust's core library architecture-specific intrinsics.")
+    (description
+      "`core::arch` - Rust's core library architecture-specific intrinsics.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-cpp-demangle
+  (package
+    (name "rust-cpp-demangle")
+    (version "0.2.12")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "cpp_demangle" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0a4hqsfc0sfdwy7pcr0rc1fjp2j47fxbkqfc2lfrbi4zlm5hq36k"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-afl" ,rust-afl)
+         ("rust-cfg-if" ,rust-cfg-if))
+        #:cargo-development-inputs
+        (("rust-clap" ,rust-clap)
+         ("rust-diff" ,rust-diff)
+         ("rust-glob" ,rust-glob))))
+    (home-page
+      "https://github.com/gimli-rs/cpp_demangle")
+    (synopsis "A crate for demangling C++ symbols")
+    (description
+      "This package provides a crate for demangling C++ symbols")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-crates-index
+  (package
+    (name "rust-crates-index")
+    (version "0.13.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "crates-index" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1n7pp6mk59hw3nqlh8irxc9pp0g5ziw7bprqsw2lxvg13cvdp76s"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-error-chain" ,rust-error-chain)
+         ("rust-git2" ,rust-git2)
+         ("rust-glob" ,rust-glob)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive)
+         ("rust-serde-json" ,rust-serde-json))
+        #:cargo-development-inputs
+        (("rust-tempdir" ,rust-tempdir))))
+    (home-page
+      "https://github.com/frewsxcv/rust-crates-index")
+    (synopsis
+      "Library for retrieving and interacting with the crates.io index")
+    (description
+      "Library for retrieving and interacting with the crates.io index")
+    (license license:asl2.0)))
+
+(define-public rust-criterion
+  (package
+    (name "rust-criterion")
+    (version "0.2.11")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "criterion" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1543wlpc4p1kz7sqqa7ylr8bkdr8l4f34hy4bxj7krpkahwhaqq3"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-atty" ,rust-atty)
+         ("rust-cast" ,rust-cast)
+         ("rust-clap" ,rust-clap)
+         ("rust-criterion-plot" ,rust-criterion-plot)
+         ("rust-csv" ,rust-csv)
+         ("rust-itertools" ,rust-itertools)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-libc" ,rust-libc)
+         ("rust-num-traits" ,rust-num-traits)
+         ("rust-rand-core" ,rust-rand-core)
+         ("rust-rand-os" ,rust-rand-os)
+         ("rust-rand-xoshiro" ,rust-rand-xoshiro)
+         ("rust-rayon" ,rust-rayon)
+         ("rust-rayon-core" ,rust-rayon-core)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive)
+         ("rust-serde-json" ,rust-serde-json)
+         ("rust-tinytemplate" ,rust-tinytemplate)
+         ("rust-walkdir" ,rust-walkdir))
+        #:cargo-development-inputs
+        (("rust-approx" ,rust-approx)
+         ("rust-quickcheck" ,rust-quickcheck)
+         ("rust-rand" ,rust-rand)
+         ("rust-tempdir" ,rust-tempdir))))
+    (home-page
+      "https://bheisler.github.io/criterion.rs/book/index.html")
+    (synopsis
+      "Statistics-driven micro-benchmarking library")
+    (description
+      "Statistics-driven micro-benchmarking library")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-crossbeam-deque
+  (package
+    (name "rust-crossbeam-deque")
+    (version "0.7.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "crossbeam-deque" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0was9x71cz5g1y3670cyy6jdmsdfg6k9mbf0ddz2k1mdd7hx535i"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-crossbeam-epoch" ,rust-crossbeam-epoch)
+         ("rust-crossbeam-utils" ,rust-crossbeam-utils))
+        #:cargo-development-inputs
+        (("rust-rand" ,rust-rand-0.6))))
+    (home-page
+      "https://github.com/crossbeam-rs/crossbeam/tree/master/crossbeam-deque")
+    (synopsis "Concurrent work-stealing deque")
+    (description "Concurrent work-stealing deque")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-crossbeam-deque-0.6
+  (package
+    (inherit rust-crossbeam-deque)
+    (name "rust-crossbeam-deque")
+    (version "0.6.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "crossbeam-deque" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "04rcpgjs6ns57vag8a3dzx26190dhbvy2l0p9n22b9p1yf64pr05"))))
+    (arguments
+      `(#:cargo-inputs
+        (("rust-crossbeam-epoch" ,rust-crossbeam-epoch)
+         ("rust-crossbeam-utils" ,rust-crossbeam-utils))
+        #:cargo-development-inputs
+        (("rust-rand" ,rust-rand-0.6))))))
+
+(define-public rust-crossbeam-deque-0.2
+  (package
+    (inherit rust-crossbeam-deque)
+    (name "rust-crossbeam-deque")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "crossbeam-deque" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1wwwbnvxh0rza38xiws8qc46klzhv19zgvarn37pijis6v2zhfgp"))))
+    (arguments
+      `(#:cargo-inputs
+        (("rust-crossbeam-epoch" ,rust-crossbeam-epoch-0.3)
+         ("rust-crossbeam-utils" ,rust-crossbeam-utils))
+        #:cargo-development-inputs
+        (("rust-rand" ,rust-rand-0.4))))))
+
+(define-public rust-crossbeam-epoch
+  (package
+    (name "rust-crossbeam-epoch")
+    (version "0.7.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "crossbeam-epoch" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1d408b9x82mdbnb405gw58v5mmdbj2rl28a1h7b9rmn25h8f7j84"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-arrayvec" ,rust-arrayvec)
+         ("rust-cfg-if" ,rust-cfg-if)
+         ("rust-crossbeam-utils" ,rust-crossbeam-utils)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-memoffset" ,rust-memoffset-0.2)
+         ("rust-scopeguard" ,rust-scopeguard-0.3))
+        #:cargo-development-inputs
+        (("rust-rand" ,rust-rand-0.6))))
+    (home-page
+      "https://github.com/crossbeam-rs/crossbeam/tree/master/crossbeam-epoch")
+    (synopsis "Epoch-based garbage collection")
+    (description "Epoch-based garbage collection")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-crossbeam-epoch-0.3
+  (package
+    (inherit rust-crossbeam-epoch)
+    (name "rust-crossbeam-epoch")
+    (version "0.3.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "crossbeam-epoch" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0l4igvp2i7b6dgaiq040j8kj8hygwdpr6ppzh1hrbsbx83sj2wcj"))))
+    (arguments
+     `(#:cargo-inputs
+       (("rust-arrayvec" ,rust-arrayvec)
+        ("rust-cfg-if" ,rust-cfg-if)
+        ("rust-crossbeam-utils" ,rust-crossbeam-utils-0.2)
+        ("rust-lazy-static" ,rust-lazy-static)
+        ("rust-memoffset" ,rust-memoffset-0.2)
+        ("rust-nodrop" ,rust-nodrop)
+        ("rust-rand" ,rust-rand-0.3)
+        ("rust-scopeguard" ,rust-scopeguard-0.3))))))
+
+(define-public rust-crossbeam-queue
+  (package
+    (name "rust-crossbeam-queue")
+    (version "0.1.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "crossbeam-queue" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0jsa9dbxnwqcxfws09vaschf92d4imlbbikmcn4ka8z7rzb9r5vw"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-crossbeam-utils" ,rust-crossbeam-utils))
+        #:cargo-development-inputs
+        (("rust-rand" ,rust-rand-0.6))))
+    (home-page
+      "https://github.com/crossbeam-rs/crossbeam/tree/master/crossbeam-utils")
+    (synopsis "Concurrent queues")
+    (description "Concurrent queues")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-crossbeam-utils
+  (package
+    (name "rust-crossbeam-utils")
+    (version "0.6.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "crossbeam-utils" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0p5aa8k3wpsn17md4rx038ac2azm9354knbxdfvn7dd7yk76yc7q"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-cfg-if" ,rust-cfg-if)
+         ("rust-lazy-static" ,rust-lazy-static))
+        #:cargo-development-inputs
+        (("rust-rand" ,rust-rand-0.6))))
+    (home-page
+      "https://github.com/crossbeam-rs/crossbeam/tree/master/crossbeam-utils")
+    (synopsis "Utilities for concurrent programming")
+    (description
+      "Utilities for concurrent programming")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-crossbeam-utils-0.2
+  (package
+    (inherit rust-crossbeam-utils)
+    (name "rust-crossbeam-utils")
+    (version "0.2.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "crossbeam-utils" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1n8qr52sw9y6yxzyfxi1phh55rsxms7ry4iipdd8vmd16ag8jq17"))))
+    (arguments
+      `(#:cargo-inputs
+        (("rust-cfg-if" ,rust-cfg-if))))))
+
+(define-public rust-custom-derive
+  (package
+    (name "rust-custom-derive")
+    (version "0.1.7")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "custom_derive" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1f81bavw1wnykwh21hh4yyzigs6zl6f6pkk9p3car8kq95yfb2pg"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-rustc-serialize" ,rust-rustc-serialize))))
+    (home-page
+      "https://github.com/DanielKeep/rust-custom-derive/tree/custom_derive-master")
+    (synopsis
+      "(Note: superseded by `macro-attr`) This crate provides a macro that enables the use of custom derive attributes.")
+    (description
+      "(Note: superseded by `macro-attr`) This crate provides a macro that enables the use of custom derive attributes.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-demo-hack
+  (package
+    (name "rust-demo-hack")
+    (version "0.0.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "demo-hack" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0m0114p1g0zzrdph5bg03i8m8p70vrwn3whs191jrbjcrmh5lmnp"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-demo-hack-impl" ,rust-demo-hack-impl)
+         ("rust-proc-macro-hack" ,rust-proc-macro-hack))))
+    (home-page
+      "https://github.com/dtolnay/proc-macro-hack")
+    (synopsis "Demo of proc-macro-hack")
+    (description "Demo of proc-macro-hack")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-demo-hack-impl
+  (package
+    (name "rust-demo-hack-impl")
+    (version "0.0.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "demo-hack-impl" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1f1fdl60xjas9wlmcl9v6f56vgm3mzwr019kcifav5464rx3w3ld"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro-hack" ,rust-proc-macro-hack)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn))))
+    (home-page
+      "https://github.com/dtolnay/proc-macro-hack")
+    (synopsis "Demo of proc-macro-hack")
+    (description "Demo of proc-macro-hack")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-diff
+  (package
+    (name "rust-diff")
+    (version "0.1.11")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "diff" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0fhavni46a2rib93ig5fgbqmm48ysms5sxzb3h9bp7vp2bwnjarw"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-quickcheck" ,rust-quickcheck)
+         ("rust-speculate" ,rust-speculate))))
+    (home-page
+      "https://github.com/utkarshkukreti/diff.rs")
+    (synopsis
+      "An LCS based slice and string diffing implementation.")
+    (description
+      "An LCS based slice and string diffing implementation.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-difference
+  (package
+    (name "rust-difference")
+    (version "2.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "difference" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1621wx4k8h452p6xzmzzvm7mz87kxh4yqz0kzxfjj9xmjxlbyk2j"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-getopts" ,rust-getopts))
+        #:cargo-development-inputs
+        (("rust-quickcheck" ,rust-quickcheck)
+         ("rust-term" ,rust-term))))
+    (home-page
+      "https://github.com/johannhof/difference.rs")
+    (synopsis
+      "A Rust text diffing and assertion library.")
+    (description
+      "This package provides a Rust text diffing and assertion library.")
+    (license license:expat)))
+
+(define-public rust-dirs
+  (package
+    (name "rust-dirs")
+    (version "2.0.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "dirs" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1qymhyq7w7wlf1dirq6gsnabdyzg6yi2yyxkx6c4ldlkbjdaibhk"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-cfg-if" ,rust-cfg-if)
+         ("rust-dirs-sys" ,rust-dirs-sys))))
+    (home-page "https://github.com/soc/dirs-rs")
+    (synopsis
+      "A tiny low-level library that provides platform-specific standard locations of directories for config, cache and other data on Linux, Windows, macOS and Redox by leveraging the mechanisms defined by the XDG base/user directory specifications on Linux, the Known Folder API on Windows, and the Standard Directory guidelines on macOS.")
+    (description
+      "This package provides a tiny low-level library that provides platform-specific standard locations of directories for config, cache and other data on Linux, Windows, macOS and Redox by leveraging the mechanisms defined by the XDG base/user directory specifications on Linux, the Known Folder API on Windows, and the Standard Directory guidelines on macOS.")
+    (license #f)))
+
+(define-public rust-dirs-sys
+  (package
+    (name "rust-dirs-sys")
+    (version "0.3.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "dirs-sys" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0yyykdcmbc476z1v9m4z5jb8y91dw6kgzpkiqi2ig07xx0yv585g"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-cfg-if" ,rust-cfg-if)
+         ("rust-libc" ,rust-libc)
+         ("rust-redox-users" ,rust-redox-users)
+         ("rust-winapi" ,rust-winapi))))
+    (home-page "https://github.com/soc/dirs-sys-rs")
+    (synopsis
+      "System-level helper functions for the dirs and directories crates.")
+    (description
+      "System-level helper functions for the dirs and directories crates.")
+    (license #f)))
+
+(define-public rust-discard ; guix upstreamable
+  (package
+    (name "rust-discard")
+    (version "1.0.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "discard" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1h67ni5bxvg95s91wgicily4ix7lcw7cq0a5gy9njrybaibhyb91"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/Pauan/rust-discard")
+    (synopsis "Allow for intentionally leaking memory")
+    (description "There are situations where you need to intentionally leak some
+memory but not other memory.  This package provides a discard trait which allows
+for intentionally leaking memory")
+    (license license:expat)))
+
+(define-public rust-doc-comment ; guix upstreamable
+  (package
+    (name "rust-doc-comment")
+    (version "0.3.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "doc-comment" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "15rsqxgarfpb1yim9sbp9yfgj7p2dq6v51c6bq1a62paii9ylgcj"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/GuillaumeGomez/doc-comment")
+    (synopsis "Macro to generate doc comments")
+    (description "This package provides a way to generate doc comments
+from macros.")
+    (license license:expat)))
+
+(define-public rust-docopt
+  (package
+    (name "rust-docopt")
+    (version "1.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "docopt" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0s9rcpmnnivs502q69lc1h1wrwapkq09ikgbfbgqf31idmc5llkz"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-lazy-static" ,rust-lazy-static)
+         ("rust-regex" ,rust-regex)
+         ("rust-serde" ,rust-serde)
+         ("rust-strsim" ,rust-strsim))))
+    (home-page "https://github.com/docopt/docopt.rs")
+    (synopsis "Command line argument parsing.")
+    (description "Command line argument parsing.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-dtoa ; guix upstreamable
+  (package
+    (name "rust-dtoa")
+    (version "0.4.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "dtoa" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0phbm7i0dpn44gzi07683zxaicjap5064w62pidci4fhhciv8mza"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/dtolnay/dtoa")
+    (synopsis "Fast functions for printing floating-point primitives")
+    (description "This crate provides fast functions for printing
+floating-point primitives to an @code{io::Write}.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-either
+  (package
+    (name "rust-either")
+    (version "1.5.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "either" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0yyggfd5yq9hyyp0bd5jj0fgz3rwws42d19ri0znxwwqs3hcy9sm"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs (("rust-serde" ,rust-serde))))
+    (home-page "https://github.com/bluss/either")
+    (synopsis
+      "The enum `Either` with variants `Left` and `Right` is a general purpose sum type with two cases.")
+    (description
+      "The enum `Either` with variants `Left` and `Right` is a general purpose sum type with two cases.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-encode-unicode
+  (package
+    (name "rust-encode-unicode")
+    (version "0.3.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "encode_unicode" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1g8a8pixkxz6r927f4sc4r15qyc0szxdxb1732v8q7h0di4wkclh"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-ascii" ,rust-ascii)
+         ("rust-clippy" ,rust-clippy))
+        #:cargo-development-inputs
+        (("rust-lazy-static" ,rust-lazy-static))))
+    (home-page
+      "https://github.com/tormol/encode_unicode")
+    (synopsis
+      "UTF-8 and UTF-16 character types, iterators and related methods for char, u8 and u16.")
+    (description
+      "UTF-8 and UTF-16 character types, iterators and related methods for char, u8 and u16.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-env-logger
+  (package
+    (name "rust-env-logger")
+    (version "0.6.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "env_logger" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1lx2s5nk96xx4i3m4zc4ghqgi8kb07dsnyiv8jk2clhax42dxz5a"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-atty" ,rust-atty)
+         ("rust-humantime" ,rust-humantime)
+         ("rust-log" ,rust-log)
+         ("rust-regex" ,rust-regex)
+         ("rust-termcolor" ,rust-termcolor))))
+    (home-page
+      "https://github.com/sebasmagri/env_logger/")
+    (synopsis
+      "A logging implementation for `log` which is configured via an environment variable.")
+    (description
+      "This package provides a logging implementation for `log` which is configured via an environment variable.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-envmnt
+  (package
+    (name "rust-envmnt")
+    (version "0.6.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "envmnt" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "12zkq3p999bypyxmjnpiqw9r3hmifb3bcikd7j3as1fdcbq01fyl"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-indexmap" ,rust-indexmap))))
+    (home-page
+      "http://github.com/sagiegurari/envmnt")
+    (synopsis
+      "Environment variables utility functions.")
+    (description
+      "Environment variables utility functions.")
+    (license license:asl2.0)))
+
+(define-public rust-erased-serde
+  (package
+    (name "rust-erased-serde")
+    (version "0.3.9")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "erased-serde" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0q7bnxs5zskfq5iillig55g7891dllcxh2p8y8k1p2j72syf9viv"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-serde-cbor" ,rust-serde-cbor)
+         ("rust-serde-derive" ,rust-serde-derive)
+         ("rust-serde-json" ,rust-serde-json))))
+    (home-page
+      "https://github.com/dtolnay/erased-serde")
+    (synopsis
+      "Type-erased Serialize and Serializer traits")
+    (description
+      "Type-erased Serialize and Serializer traits")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-error-chain
+  (package
+    (name "rust-error-chain")
+    (version "0.12.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "error-chain" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1ndpw1ny2kxqpw6k1shq8k56z4vfpk4xz9zr8ay988k0rffrxd1s"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-backtrace" ,rust-backtrace))
+        #:cargo-development-inputs
+        (("rust-version-check" ,rust-version-check))))
+    (home-page
+      "https://github.com/rust-lang-nursery/error-chain")
+    (synopsis
+      "Yet another error boilerplate library.")
+    (description
+      "Yet another error boilerplate library.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-failure
+  (package
+    (name "rust-failure")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "failure" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1qppmgv4i5jj6vrss91qackqnl0a12h7lnby4l7j5fdy78yxhnvr"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-backtrace" ,rust-backtrace)
+         ("rust-failure-derive" ,rust-failure-derive))))
+    (home-page
+      "https://rust-lang-nursery.github.io/failure/")
+    (synopsis
+      "Experimental error handling abstraction.")
+    (description
+      "Experimental error handling abstraction.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-failure-derive
+  (package
+    (name "rust-failure-derive")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "failure_derive" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1q97n7dp51j5hndzic9ng2fgn6f3z5ya1992w84l7vypby8n647a"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn)
+         ("rust-synstructure" ,rust-synstructure))
+        #:cargo-development-inputs
+        (("rust-failure" ,rust-failure))))
+    (home-page
+      "https://rust-lang-nursery.github.io/failure/")
+    (synopsis "derives for the failure crate")
+    (description "derives for the failure crate")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-fallible-iterator ; guix upstreamable
+  (package
+    (name "rust-fallible-iterator")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "fallible-iterator" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1xq759lsr8gqss7hva42azn3whgrbrs2sd9xpn92c5ickxm1fhs4"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/sfackler/rust-fallible-iterator")
+    (synopsis "Fallible iterator traits")
+    (description "If the @code{std} or @code{alloc} features are enabled, this
+crate provides implementations for @code{Box}, @code{Vec}, @code{BTreeMap}, and
+@code{BTreeSet}.  If the @code{std} feature is enabled, this crate additionally
+provides implementations for @code{HashMap} and @code{HashSet}.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-findshlibs
+  (package
+    (name "rust-findshlibs")
+    (version "0.5.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "findshlibs" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1n2vagn0q5yim32hxkwi1cjgp3yn1dm45p7z8nw6lapywihhs9mi"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-lazy-static" ,rust-lazy-static)
+         ("rust-libc" ,rust-libc))))
+    (home-page
+      "https://github.com/gimli-rs/findshlibs")
+    (synopsis
+      "Find the set of shared libraries loaded in the current process with a cross platform API")
+    (description
+      "Find the set of shared libraries loaded in the current process with a cross platform API")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-float-ord
+  (package
+    (name "rust-float-ord")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "float-ord" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0kin50365sr3spnbscq43lksymybi99ai9rkqdw90m6vixhlibbv"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-rand" ,rust-rand))))
+    (home-page
+      "https://github.com/notriddle/rust-float-ord")
+    (synopsis
+      "A total ordering for floating-point numbers")
+    (description
+      "This package provides a total ordering for floating-point numbers")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-fnv ; guix upstreamable
+  (package
+    (name "rust-fnv")
+    (version "1.0.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "fnv" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1ww56bi1r5b8id3ns9j3qxbi7w5h005rzhiryy0zi9h97raqbb9g"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/servo/rust-fnv")
+    (synopsis "implementation of the Fowler-Noll-Vo hash function")
+    (description "The @code{fnv} hash function is a custom @code{Hasher}
+implementation that is more efficient for smaller hash keys.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-fs-extra ; guix upstreamable
+  (package
+    (name "rust-fs-extra")
+    (version "1.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "fs_extra" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0x6675wdhsx277k1k1235jwcv38naf20d8kwrk948ds26hh4lajz"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/webdesus/fs_extra")
+    (synopsis "Extra filesystem methods")
+    (description "Expanding opportunities standard library @code{std::fs} and
+@code{std::io}.  Recursively copy folders with recept information about
+process and much more.")
+    (license license:expat)))
+
+(define-public rust-fst
+  (package
+    (name "rust-fst")
+    (version "0.3.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "fst" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1mpby7wa5mkpgjiilam94a2l9mxx9wpgs3nw2nr1a0czzwsb8zwj"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-byteorder" ,rust-byteorder)
+         ("rust-memmap" ,rust-memmap))
+        #:cargo-development-inputs
+        (("rust-fnv" ,rust-fnv)
+         ("rust-fst-levenshtein" ,rust-fst-levenshtein)
+         ("rust-fst-regex" ,rust-fst-regex)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-quickcheck" ,rust-quickcheck)
+         ("rust-rand" ,rust-rand))))
+    (home-page "https://github.com/BurntSushi/fst")
+    (synopsis
+      "Use finite state transducers to compactly represents sets or maps of many strings (> 1 billion is possible).")
+    (description
+      "Use finite state transducers to compactly represents sets or maps of many strings (> 1 billion is possible). ")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-fst-levenshtein
+  (package
+    (name "rust-fst-levenshtein")
+    (version "0.2.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "fst-levenshtein" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1s5ml10442bbnpmilmwjh4pfixsj6837rg68vjzg63i3djd4524y"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-fst" ,rust-fst)
+         ("rust-utf8-ranges" ,rust-utf8-ranges))))
+    (home-page "https://github.com/BurntSushi/fst")
+    (synopsis
+      "Search finite state transducers with fuzzy queries using Levenshtein automata.")
+    (description
+      "Search finite state transducers with fuzzy queries using Levenshtein automata.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-fst-regex
+  (package
+    (name "rust-fst-regex")
+    (version "0.2.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "fst-regex" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "126xrv3s8mrq8nqsahmpy0nlks6l3wlivqyf6a0i4g7d3vcs3b47"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-fst" ,rust-fst)
+         ("rust-regex-syntax" ,rust-regex-syntax)
+         ("rust-utf8-ranges" ,rust-utf8-ranges))))
+    (home-page "https://github.com/BurntSushi/fst")
+    (synopsis
+      "Search finite state transducers with regular expression.")
+    (description
+      "Search finite state transducers with regular expression.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-fuchsia-cprng ; guix upstreamable
+  (package
+    (name "rust-fuchsia-cprng")
+    (version "0.1.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "fuchsia-cprng" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1fnkqrbz7ixxzsb04bsz9p0zzazanma8znfdqjvh39n14vapfvx0"))))
+    (build-system cargo-build-system)
+    (home-page "https://fuchsia.googlesource.com/fuchsia/+/master/garnet/public/rust/fuchsia-cprng")
+    (synopsis "Fuchsia cryptographically secure pseudorandom number generator")
+    (description "Rust crate for the Fuchsia cryptographically secure
+pseudorandom number generator")
+    (license license:bsd-3)))
+
+(define-public rust-futures ; guix upstreamable
+  (package
+    (name "rust-futures")
+    (version "0.1.28")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "futures" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0saq8ffjw1pwf1pzhw3kq1z7dfq6wpd8x93dnni6vbkc799kkp25"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/rust-lang-nursery/futures-rs")
+    (synopsis "Implementation of zero-cost futures in Rust")
+    (description "An implementation of @code{futures} and @code{streams}
+featuring zero allocations, composability, and iterator-like interfaces.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-futures-channel-preview
+  (package
+    (name "rust-futures-channel-preview")
+    (version "0.3.0-alpha.17")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "futures-channel-preview" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1blgpikhw391lzrfqcgg4xsn5xc0dlybni77ka7f0vb08zaixir1"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-futures-core-preview"
+          ,rust-futures-core-preview)
+         ("rust-futures-sink-preview"
+          ,rust-futures-sink-preview))))
+    (home-page
+      "https://rust-lang-nursery.github.io/futures-rs")
+    (synopsis
+      "Channels for asynchronous communication using futures-rs.")
+    (description
+      "Channels for asynchronous communication using futures-rs.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-futures-core-preview ; guix upstreamable
+  (package
+    (name "rust-futures-core-preview")
+    (version "0.3.0-alpha.17")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "futures-core-preview" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1xaq8m609k6cz8xydwhwp8xxyxigabcw1w9ngycfy0bnkg7iq52b"))))
+    (build-system cargo-build-system)
+    (home-page "https://rust-lang-nursery.github.io/futures-rs")
+    (synopsis "Core traits and types in for the @code{futures} library.")
+    (description "This crate provides the core traits and types in for the
+@code{futures} library.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-futures-executor-preview
+  (package
+    (name "rust-futures-executor-preview")
+    (version "0.3.0-alpha.17")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "futures-executor-preview" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "053g5kf2qa1xhdkwp3d1grrizzy4683mpbb3y0vvm00hwl7jdfl7"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-futures-channel-preview"
+          ,rust-futures-channel-preview)
+         ("rust-futures-core-preview"
+          ,rust-futures-core-preview)
+         ("rust-futures-util-preview"
+          ,rust-futures-util-preview)
+         ("rust-num-cpus" ,rust-num-cpus))))
+    (home-page
+      "https://rust-lang-nursery.github.io/futures-rs")
+    (synopsis
+      "Executors for asynchronous tasks based on the futures-rs library.")
+    (description
+      "Executors for asynchronous tasks based on the futures-rs library.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-futures-io-preview ; guix upstreamable
+  (package
+    (name "rust-futures-io-preview")
+    (version "0.3.0-alpha.17")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "futures-io-preview" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0fhvwhdb8ywjjbfng0ra1r8yyc9yzpyxg9sv3spb3f7w0lk40bh8"))))
+    (build-system cargo-build-system)
+    (home-page "https://rust-lang-nursery.github.io/futures-rs")
+    (synopsis "Async read and write traits for the futures library")
+    (description "This crate provides the @code{AsyncRead} and
+@code{AsyncWrite} traits for the @code{futures-rs} library.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-futures-select-macro-preview
+  (package
+    (name "rust-futures-select-macro-preview")
+    (version "0.3.0-alpha.17")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri
+               "futures-select-macro-preview"
+               version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1a90ivjzkgz7msiz5si05xzi8xwsk5gar1gkrbmrgqpgkliqd7a6"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro-hack" ,rust-proc-macro-hack)
+         ("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn))))
+    (home-page
+      "https://rust-lang-nursery.github.io/futures-rs")
+    (synopsis
+      "The `select!` macro for waiting on multiple different `Future`s at once and handling the first one to complete.")
+    (description
+      "The `select!` macro for waiting on multiple different `Future`s at once and handling the first one to complete.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-futures-sink-preview
+  (package
+    (name "rust-futures-sink-preview")
+    (version "0.3.0-alpha.17")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "futures-sink-preview" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1r4d0gy73hdxkh5g1lrhl1kjnwp6mywjgcj70v0z78b921da42a3"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-futures-core-preview"
+          ,rust-futures-core-preview))))
+    (home-page
+      "https://rust-lang-nursery.github.io/futures-rs")
+    (synopsis
+      "The asynchronous `Sink` trait for the futures-rs library.")
+    (description
+      "The asynchronous `Sink` trait for the futures-rs library.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-futures-util-preview
+  (package
+    (name "rust-futures-util-preview")
+    (version "0.3.0-alpha.17")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "futures-util-preview" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0kizm86wgr5qldyavskfi0r1msg6m4x2pkj0d4r04br2ig29i0dg"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-futures" ,rust-futures)
+         ("rust-futures-channel-preview"
+          ,rust-futures-channel-preview)
+         ("rust-futures-core-preview"
+          ,rust-futures-core-preview)
+         ("rust-futures-io-preview"
+          ,rust-futures-io-preview)
+         ("rust-futures-select-macro-preview"
+          ,rust-futures-select-macro-preview)
+         ("rust-futures-sink-preview"
+          ,rust-futures-sink-preview)
+         ("rust-memchr" ,rust-memchr)
+         ("rust-pin-utils" ,rust-pin-utils)
+         ("rust-proc-macro-hack" ,rust-proc-macro-hack)
+         ("rust-proc-macro-nested"
+          ,rust-proc-macro-nested)
+         ("rust-rand" ,rust-rand)
+         ("rust-slab" ,rust-slab)
+         ("rust-tokio-io" ,rust-tokio-io))))
+    (home-page
+      "https://rust-lang-nursery.github.io/futures-rs")
+    (synopsis
+      "Common utilities and extension traits for the futures-rs library.")
+    (description
+      "Common utilities and extension traits for the futures-rs library.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-fxhash
+  (package
+    (name "rust-fxhash")
+    (version "0.2.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "fxhash" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "037mb9ichariqi45xm6mz0b11pa92gj38ba0409z3iz239sns6y3"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-byteorder" ,rust-byteorder))
+        #:cargo-development-inputs
+        (("rust-fnv" ,rust-fnv)
+         ("rust-seahash" ,rust-seahash))))
+    (home-page "https://github.com/cbreeden/fxhash")
+    (synopsis
+      "A fast, non-secure, hashing algorithm derived from an internal hasher used in FireFox and Rustc.")
+    (description
+      "This package provides a fast, non-secure, hashing algorithm derived from an internal hasher used in FireFox and Rustc.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-generic-array
+  (package
+    (name "rust-generic-array")
+    (version "0.13.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "generic-array" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1kddwxpd58y807y1r3lijg7sw3gxm6nczl6wp57gamhv6mhygl8f"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-serde" ,rust-serde)
+         ("rust-typenum" ,rust-typenum))
+        #:cargo-development-inputs
+        (("rust-bincode" ,rust-bincode)
+         ("rust-serde-json" ,rust-serde-json))))
+    (home-page
+      "https://github.com/fizyk20/generic-array.git")
+    (synopsis
+      "Generic types implementing functionality of arrays")
+    (description
+      "Generic types implementing functionality of arrays")
+    (license license:expat)))
+
+(define-public rust-getopts
+  (package
+    (name "rust-getopts")
+    (version "0.2.19")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "getopts" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0l74ldicw6gpkly3jdiq8vq8g597x7akvych2cgy7gr8q8apnckj"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-unicode-width" ,rust-unicode-width))
+        #:cargo-development-inputs
+        (("rust-log" ,rust-log))))
+    (home-page
+      "https://github.com/rust-lang/getopts")
+    (synopsis "getopts-like option parsing.")
+    (description "getopts-like option parsing.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-getrandom
+  (package
+    (name "rust-getrandom")
+    (version "0.1.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "getrandom" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0macrjfkgsjn6ikr94agapp4fkxmr8w7y2g7qis4icc4a17cwp76"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-lazy-static" ,rust-lazy-static)
+         ("rust-libc" ,rust-libc)
+         ("rust-log" ,rust-log)
+         ("rust-stdweb" ,rust-stdweb)
+         ("rust-wasm-bindgen" ,rust-wasm-bindgen))))
+    (home-page
+      "https://github.com/rust-random/getrandom")
+    (synopsis
+      "A small cross-platform library for retrieving random data from system source")
+    (description
+      "This package provides a small cross-platform library for retrieving random data from system source")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-git2
+  (package
+    (name "rust-git2")
+    (version "0.9.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "git2" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "09lj6i26yial0drdbmfh36avz6wizaxqb0k41sqn2kca1qv01d4c"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bitflags" ,rust-bitflags)
+         ("rust-libc" ,rust-libc)
+         ("rust-libgit2-sys" ,rust-libgit2-sys)
+         ("rust-log" ,rust-log)
+         ("rust-openssl-probe" ,rust-openssl-probe)
+         ("rust-openssl-sys" ,rust-openssl-sys)
+         ("rust-url" ,rust-url))
+        #:cargo-development-inputs
+        (("rust-docopt" ,rust-docopt)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive)
+         ("rust-tempdir" ,rust-tempdir)
+         ("rust-thread-id" ,rust-thread-id)
+         ("rust-time" ,rust-time))))
+    ;(inputs
+    ; `(("libgit" ,(@ (gnu packages version-control) libgit2))))
+    (home-page
+      "https://github.com/rust-lang/git2-rs")
+    (synopsis
+      "Bindings to libgit2 for interoperating with git repositories. This library is
+      both threadsafe and memory safe and allows both reading and writing git
+      repositories.")
+    (description
+      "Bindings to libgit2 for interoperating with git repositories.  This library is
+      both threadsafe and memory safe and allows both reading and writing git
+      repositories.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-gimli
+  (package
+    (name "rust-gimli")
+    (version "0.19.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "gimli" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "006dpaa63y01wb58nvs2hhj3qqx52yxg20njjflr0frfbyp1hb8n"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-arrayvec" ,rust-arrayvec)
+         ("rust-byteorder" ,rust-byteorder)
+         ("rust-fallible-iterator"
+          ,rust-fallible-iterator)
+         ("rust-indexmap" ,rust-indexmap)
+         ("rust-stable-deref-trait"
+          ,rust-stable-deref-trait))
+        #:cargo-development-inputs
+        (("rust-crossbeam" ,rust-crossbeam)
+         ("rust-getopts" ,rust-getopts)
+         ("rust-memmap" ,rust-memmap)
+         ("rust-num-cpus" ,rust-num-cpus)
+         ("rust-object" ,rust-object)
+         ("rust-rayon" ,rust-rayon)
+         ("rust-regex" ,rust-regex)
+         ("rust-test-assembler" ,rust-test-assembler)
+         ("rust-typed-arena" ,rust-typed-arena))))
+    (home-page "https://github.com/gimli-rs/gimli")
+    (synopsis
+      "A library for reading and writing the DWARF debugging format.")
+    (description
+      "This package provides a library for reading and writing the DWARF debugging format.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-glob
+  (package
+    (name "rust-glob")
+    (version "0.3.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "glob" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0x25wfr7vg3mzxc9x05dcphvd3nwlcmbnxrvwcvrrdwplcrrk4cv"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-tempdir" ,rust-tempdir))))
+    (home-page "https://github.com/rust-lang/glob")
+    (synopsis
+      "Support for matching file paths against Unix shell style patterns.")
+    (description
+      "Support for matching file paths against Unix shell style patterns.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-glob-0.2
+  (package
+    (inherit rust-glob)
+    (name "rust-glob")
+    (version "0.2.11")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "glob" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1ysvi72slkw784fcsymgj4308c3y03gwjjzqxp80xdjnkbh8vqcb"))))
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-tempdir" ,rust-tempdir))))))
+
+(define-public rust-goblin
+  (package
+    (name "rust-goblin")
+    (version "0.0.24")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "goblin" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1c31nrraiixy0mnda2227ih3h2g1k4pllg2kwk8yj6lwj4fjdyp3"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-log" ,rust-log)
+         ("rust-plain" ,rust-plain)
+         ("rust-scroll" ,rust-scroll))))
+    (home-page "https://github.com/m4b/goblin")
+    (synopsis
+      "An impish, cross-platform, ELF, Mach-o, and PE binary parsing and loading crate")
+    (description
+      "An impish, cross-platform, ELF, Mach-o, and PE binary parsing and loading crate")
+    (license license:expat)))
+
+(define-public rust-heapsize
+  (package
+    (name "rust-heapsize")
+    (version "0.4.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "heapsize" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0q94q9ppqjgrw71swiyia4hgby2cz6dldp7ij57nkvhd6zmfcy8n"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs (("rust-winapi" ,rust-winapi))))
+    (home-page "https://github.com/servo/heapsize")
+    (synopsis
+      "Infrastructure for measuring the total runtime size of an object on the heap")
+    (description
+      "Infrastructure for measuring the total runtime size of an object on the heap")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-heck
+  (package
+    (name "rust-heck")
+    (version "0.3.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "heck" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "01a2v7yvkiqxakdqz4hw3w3g4sm52ivz9cs3qcsv2arxsmw4wmi0"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-unicode-segmentation"
+          ,rust-unicode-segmentation))))
+    (home-page
+      "https://github.com/withoutboats/heck")
+    (synopsis "heck is a case conversion library.")
+    (description
+      "heck is a case conversion library.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-hex ; guix upstreamable
+  (package
+    (name "rust-hex")
+    (version "0.3.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "hex" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0xsdcjiik5j750j67zk42qdnmm4ahirk3gmkmcqgq7qls2jjcl40"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/KokaKiwi/rust-hex")
+    (synopsis "Encode and decode data to/from hexadecimals")
+    (description "This crate allows for encoding and decoding data into/from
+hexadecimal representation.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-hex-literal
+  (package
+    (name "rust-hex-literal")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "hex-literal" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0ni2nv3di0jpih2xnmlnr6s96zypkdr8xrw2cvk4f8fx5wb6inn3"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-hex-literal-impl" ,rust-hex-literal-impl)
+         ("rust-proc-macro-hack" ,rust-proc-macro-hack))))
+    (home-page "https://github.com/RustCrypto/utils")
+    (synopsis
+      "Procedural macro for converting hexadecimal string to byte array at compile time.")
+    (description
+      "Procedural macro for converting hexadecimal string to byte array at compile time.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-hex-literal-impl
+  (package
+    (name "rust-hex-literal-impl")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "hex-literal-impl" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "04m6d1k57a9h3hhdgn0vq1hkfwjv9hfkw6q73bqn0my0qw45s286"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro-hack" ,rust-proc-macro-hack))))
+    (home-page "https://github.com/RustCrypto/utils")
+    (synopsis
+      "Internal implementation of the hex-literal crate")
+    (description
+      "Internal implementation of the hex-literal crate")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-humantime
+  (package
+    (name "rust-humantime")
+    (version "1.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "humantime" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "057ilhy6vc9iqhhby5ymh45m051pgxwq2z437gwkbnqhw7rfb9rw"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-quick-error" ,rust-quick-error))
+        #:cargo-development-inputs
+        (("rust-chrono" ,rust-chrono)
+         ("rust-rand" ,rust-rand-0.4)
+         ("rust-time" ,rust-time))))
+    (home-page
+      "https://github.com/tailhook/humantime")
+    (synopsis
+      "A parser and formatter for std::time::{Duration, SystemTime}")
+    (description
+      "A parser and formatter for std::time::{Duration, SystemTime}")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-hyphenation
+  (package
+    (name "rust-hyphenation")
+    (version "0.7.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "hyphenation" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0k5msv8calmnfd5kw1rmq4bg5hn1vcd39kbsxl57sdld63xwd4q4"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-atlatl" ,rust-atlatl)
+         ("rust-bincode" ,rust-bincode)
+         ("rust-hyphenation-commons"
+          ,rust-hyphenation-commons)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-atlatl" ,rust-atlatl)
+         ("rust-bincode" ,rust-bincode)
+         ("rust-hyphenation-commons"
+          ,rust-hyphenation-commons)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-pocket-resources" ,rust-pocket-resources)
+         ("rust-quickcheck" ,rust-quickcheck)
+         ("rust-serde" ,rust-serde)
+         ("rust-unicode-normalization"
+          ,rust-unicode-normalization)
+         ("rust-unicode-segmentation"
+          ,rust-unicode-segmentation))))
+    (home-page
+      "https://github.com/tapeinosyne/hyphenation")
+    (synopsis
+      "Knuth-Liang hyphenation for a variety of languages")
+    (description
+      "Knuth-Liang hyphenation for a variety of languages")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-hyphenation-commons
+  (package
+    (name "rust-hyphenation-commons")
+    (version "0.7.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "hyphenation_commons" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1pasnbk3rbdgf30jjjh1h24a9pxpdrnn0ihcivmpnzqha6mn2d4y"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-atlatl" ,rust-atlatl)
+         ("rust-serde" ,rust-serde))))
+    (home-page
+      "https://github.com/tapeinosyne/hyphenation")
+    (synopsis
+      "Proemial code for the `hyphenation` library")
+    (description
+      "Proemial code for the `hyphenation` library")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-idna
+  (package
+    (name "rust-idna")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "idna" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1a9066imqpdrm1aavfasdyb1zahqaz8jmdcwdawvb1pf60y6gqh2"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-matches" ,rust-matches)
+         ("rust-unicode-bidi" ,rust-unicode-bidi)
+         ("rust-unicode-normalization"
+          ,rust-unicode-normalization))
+        #:cargo-development-inputs
+        (("rust-rustc-test" ,rust-rustc-test)
+         ("rust-serde-json" ,rust-serde-json))))
+    (home-page "https://github.com/servo/rust-url/")
+    (synopsis
+      "IDNA (Internationalizing Domain Names in Applications) and Punycode.")
+    (description
+      "IDNA (Internationalizing Domain Names in Applications) and Punycode.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-indexmap
+  (package
+    (name "rust-indexmap")
+    (version "1.0.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "indexmap" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "13f5k1kl2759y4xfy0vhays35fmrkmhqngbr2ny8smvrbz0ag0by"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-fnv" ,rust-fnv)
+         ("rust-itertools" ,rust-itertools)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-quickcheck" ,rust-quickcheck)
+         ("rust-rand" ,rust-rand)
+         ("rust-serde-test" ,rust-serde-test))))
+    (home-page "https://github.com/bluss/indexmap")
+    (synopsis
+      "A hash table with consistent order and fast iteration.
+
+      The indexmap is a hash table where the iteration order of the key-value
+      pairs is independent of the hash values of the keys. It has the usual
+      hash table functionality, it preserves insertion order except after
+      removals, and it allows lookup of its elements by either hash table key
+      or numerical index. A corresponding hash set type is also provided.
+
+      This crate was initially published under the name ordermap, but it was renamed to
+      indexmap.")
+    (description
+      "This package provides a hash table with consistent order and fast iteration.
+
+      The indexmap is a hash table where the iteration order of the key-value
+      pairs is independent of the hash values of the keys.  It has the usual
+      hash table functionality, it preserves insertion order except after
+      removals, and it allows lookup of its elements by either hash table key
+      or numerical index.  A corresponding hash set type is also provided.
+
+      This crate was initially published under the name ordermap, but it was renamed to
+      indexmap.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-insta
+  (package
+    (name "rust-insta")
+    (version "0.8.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "insta" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1jk41bzid509y3s2r3hwh0s8cmcyywd0jzcgbs4ixb6sm2b7d0ll"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-chrono" ,rust-chrono)
+         ("rust-ci-info" ,rust-ci-info)
+         ("rust-console" ,rust-console)
+         ("rust-difference" ,rust-difference)
+         ("rust-failure" ,rust-failure)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-pest" ,rust-pest)
+         ("rust-pest-derive" ,rust-pest-derive)
+         ("rust-ron" ,rust-ron)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-json" ,rust-serde-json)
+         ("rust-serde-yaml" ,rust-serde-yaml)
+         ("rust-uuid" ,rust-uuid))))
+    (home-page "https://github.com/mitsuhiko/insta")
+    (synopsis "A snapshot testing library for Rust")
+    (description
+      "This package provides a snapshot testing library for Rust")
+    (license license:asl2.0)))
+
+(define-public rust-intervaltree
+  (package
+    (name "rust-intervaltree")
+    (version "0.2.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "intervaltree" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "10k40gsv79kwnsqrzwmnmm6psa5fqws8yggavmbggvymv16hffdg"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-smallvec" ,rust-smallvec))))
+    (home-page
+      "https://github.com/main--/rust-intervaltree")
+    (synopsis
+      "A simple and generic implementation of an immutable interval tree.")
+    (description
+      "This package provides a simple and generic implementation of an immutable interval tree.")
+    (license license:expat)))
+
+(define-public rust-iovec
+  (package
+    (name "rust-iovec")
+    (version "0.1.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "iovec" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "025vi072m22299z3fg73qid188z2iip7k41ba6v5v5yhwwby9rnv"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-libc" ,rust-libc)
+         ("rust-winapi" ,rust-winapi))))
+    (home-page "https://github.com/carllerche/iovec")
+    (synopsis
+      "Portable buffer type for scatter/gather I/O operations")
+    (description
+      "Portable buffer type for scatter/gather I/O operations")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-itertools
+  (package
+    (name "rust-itertools")
+    (version "0.8.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "itertools" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0n2k13b6w4x2x6np2lykh9bj3b3z4hwh2r4cn3z2dgnfq7cng12v"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-either" ,rust-either))
+        #:cargo-development-inputs
+        (("rust-permutohedron" ,rust-permutohedron)
+         ("rust-quickcheck" ,rust-quickcheck)
+         ("rust-rand" ,rust-rand))))
+    (home-page
+      "https://github.com/bluss/rust-itertools")
+    (synopsis
+      "Extra iterator adaptors, iterator methods, free functions, and macros.")
+    (description
+      "Extra iterator adaptors, iterator methods, free functions, and macros.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-itoa ; guix upstreamable
+  (package
+    (name "rust-itoa")
+    (version "0.4.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "itoa" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0zvg2d9qv3avhf3d8ggglh6fdyw8kkwqg3r4622ly5yhxnvnc4jh"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/dtolnay/itoa")
+    (synopsis "Fast functions for printing integer primitives")
+    (description "This crate provides fast functions for printing integer
+primitives to an @code{io::Write}.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-jemalloc-sys
+  (package
+    (name "rust-jemalloc-sys")
+    (version "0.3.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "jemalloc-sys" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0ify9vlql01qhfxlj7d4p9jvcp90mj2h69nkbq7slccvbhzryfqd"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-libc" ,rust-libc)
+         ("rust-cc" ,rust-cc)
+         ("rust-fs-extra" ,rust-fs-extra))))
+    (inputs
+     `(("jemalloc" ,(@ (gnu packages jemalloc) jemalloc))
+       ("rust-cc" ,rust-cc)))
+    (home-page
+      "https://github.com/gnzlbg/jemallocator")
+    (synopsis "Rust FFI bindings to jemalloc")
+    (description "Rust FFI bindings to jemalloc")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-jemallocator
+  (package
+    (name "rust-jemallocator")
+    (version "0.3.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "jemallocator" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0sabfa5118b7l4ars5n36s2fjyfn59w4d6mjs6rrmsa5zky67bj3"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-jemalloc-sys" ,rust-jemalloc-sys)
+        ("rust-libc" ,rust-libc))
+       #:cargo-development-inputs
+       (("rust-paste" ,rust-paste))))
+    (home-page "https://github.com/gnzlbg/jemallocator")
+    (synopsis "A Rust allocator backed by jemalloc")
+    (description
+      "This package provides a Rust allocator backed by jemalloc")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-json ; guix upstreamable
+  (package
+    (name "rust-json")
+    (version "0.11.14")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "json" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1hj8c6xj5c2aqqszi8naaflmcdbya1i9byyjrq4iybxjb4q91mq1"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/maciejhirsz/json-rust")
+    (synopsis "JSON implementation in Rust")
+    (description "This crate provides a JSON implementation in Rust, reducing
+friction with idiomatic Rust structs to ease interopability.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-lazy-static
+  (package
+    (name "rust-lazy-static")
+    (version "1.3.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "lazy_static" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "052ac27w189hrf1j3hz7sga46rp84zl2hqnzyihxv78mgzr2jmxw"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs (("rust-spin" ,rust-spin))))
+    (home-page
+      "https://github.com/rust-lang-nursery/lazy-static.rs")
+    (synopsis
+      "A macro for declaring lazily evaluated statics in Rust.")
+    (description
+      "This package provides a macro for declaring lazily evaluated statics in Rust.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-lazycell
+  (package
+    (name "rust-lazycell")
+    (version "1.2.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "lazycell" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0gvqycmpv7parc98i6y64ai7rvxrn1947z2a6maa02g4kvxdd55j"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs (("rust-clippy" ,rust-clippy))))
+    (home-page "https://github.com/indiv0/lazycell")
+    (synopsis
+      "A library providing a lazily filled Cell struct")
+    (description
+      "This package provides a library providing a lazily filled Cell struct")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-lexical-core
+  (package
+    (name "rust-lexical-core")
+    (version "0.4.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "lexical-core" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1gr5y3ykghd3wjc00l3iizkj1dxylyhwi6fj6yn2qg06nzx771iz"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-cfg-if" ,rust-cfg-if)
+         ("rust-dtoa" ,rust-dtoa)
+         ("rust-ryu" ,rust-ryu)
+         ("rust-stackvector" ,rust-stackvector)
+         ("rust-static-assertions"
+          ,rust-static-assertions))
+        #:cargo-development-inputs
+        (("rust-approx" ,rust-approx)
+         ("rust-proptest" ,rust-proptest)
+         ("rust-quickcheck" ,rust-quickcheck)
+         ("rust-rustc-version" ,rust-rustc-version))))
+    (home-page
+      "https://github.com/Alexhuszagh/rust-lexical/tree/master/lexical-core")
+    (synopsis
+      "Lexical, to- and from-string conversion routines.")
+    (description
+      "Lexical, to- and from-string conversion routines.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-libc
+  (package
+    (name "rust-libc")
+    (version "0.2.60")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "libc" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1sxmlcyb39v8awlq5ndaiiq2vja3mc4vf97nxz3qjy007xiq0knl"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-rustc-std-workspace-core"
+         ,rust-rustc-std-workspace-core))))
+    (home-page "https://github.com/rust-lang/libc")
+    (synopsis
+     "Raw FFI bindings to platform libraries like libc.")
+    (description
+     "Raw FFI bindings to platform libraries like libc.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-libgit2-sys
+  (package
+    (name "rust-libgit2-sys")
+    (version "0.8.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "libgit2-sys" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0y2mibmx7wy91s2kmb2gfb29mrqlqaxpy5wcwr8s1lwws7b9w5sc"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-libc" ,rust-libc)
+         ("rust-libssh2-sys" ,rust-libssh2-sys)
+         ("rust-libz-sys" ,rust-libz-sys)
+         ("rust-openssl-sys" ,rust-openssl-sys))
+        #:cargo-development-inputs
+        (("rust-cc" ,rust-cc)
+         ("rust-pkg-config" ,rust-pkg-config))))
+    ;(inputs
+    ; `(("libgit" ,(@ (gnu packages version-control) libgit2))))
+    (home-page
+      "https://github.com/rust-lang/git2-rs")
+    (synopsis
+      "Native bindings to the libgit2 library")
+    (description
+      "Native bindings to the libgit2 library")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-libloading
+  (package
+    (name "rust-libloading")
+    (version "0.5.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "libloading" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0lyply8rcqc8agajzxs7bq6ivba9dnn1i68kgb9z2flnfjh13cgj"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-cc" ,rust-cc)
+         ("rust-winapi" ,rust-winapi))))
+    (home-page
+      "https://github.com/nagisa/rust_libloading/")
+    (synopsis
+      "A safer binding to platformâ\x80\x99s dynamic library loading utilities")
+    (description
+      "This package provides a safer binding to platformâ\x80\x99s dynamic library loading utilities")
+    (license license:isc)))
+
+(define-public rust-libssh2-sys
+  (package
+    (name "rust-libssh2-sys")
+    (version "0.2.11")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "libssh2-sys" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "17dz3xxy5bc73sr52maa6wdqmw1a0ymznrgfzlxid2rng101yshj"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-libc" ,rust-libc)
+         ("rust-libz-sys" ,rust-libz-sys)
+         ("rust-openssl-sys" ,rust-openssl-sys)
+         ("rust-vcpkg" ,rust-vcpkg))
+        #:cargo-development-inputs
+        (("rust-cc" ,rust-cc)
+         ("rust-pkg-config" ,rust-pkg-config))))
+    ;(inputs
+    ; `(("libssh2" ,(@ (gnu packages ssh) libssh2))))
+    (home-page
+      "https://github.com/alexcrichton/ssh2-rs")
+    (synopsis
+      "Native bindings to the libssh2 library")
+    (description
+      "Native bindings to the libssh2 library")
+    (license (list license:asl2.0
+                   license:expat))))
+
+;; TODO: Unbundle zlib
+(define-public rust-libz-sys
+  (package
+    (name "rust-libz-sys")
+    (version "1.0.25")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "libz-sys" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1gjycyl2283525abks98bhxa4r259m617xfm5z52p3p3c8ry9d9f"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-libc" ,rust-libc))
+       #:cargo-development-inputs
+       (("rust-cc" ,rust-cc)
+        ("rust-pkg-config" ,rust-pkg-config)
+        ("rust-vcpkg" ,rust-vcpkg))))
+    (home-page "https://github.com/alexcrichton/libz-sys")
+    (synopsis "Bindings to the system libz library (also known as zlib).")
+    (description
+      "Bindings to the system libz library (also known as zlib).")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-linked-hash-map
+  (package
+    (name "rust-linked-hash-map")
+    (version "0.5.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "linked-hash-map" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "10qgbvh00q36ql0jh00rxh2jlq6qvl11n6mig0cvkpf4xf5bd4df"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-clippy" ,rust-clippy)
+         ("rust-heapsize" ,rust-heapsize)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-test" ,rust-serde-test))))
+    (home-page
+      "https://github.com/contain-rs/linked-hash-map")
+    (synopsis
+      "A HashMap wrapper that holds key-value pairs in insertion order")
+    (description
+      "This package provides a HashMap wrapper that holds key-value pairs in insertion order")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-lipsum
+  (package
+    (name "rust-lipsum")
+    (version "0.6.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "lipsum" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0nlxkz8zjxqmbrxqasr36a5fqn2n33cxy11w0x0a0b6mcx04dr2q"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-rand" ,rust-rand))
+        #:cargo-development-inputs
+        (("rust-rand-xorshift" ,rust-rand-xorshift)
+         ("rust-version-sync" ,rust-version-sync))))
+    (home-page "https://github.com/mgeisler/lipsum/")
+    (synopsis
+      "Lipsum is a lorem ipsum text generation library. Use this if you need
+      some filler text for your application.
+
+      The text is generated using a simple Markov chain, which you can also
+      instantiate to generate your own pieces of pseudo-random text.")
+    (description
+      "Lipsum is a lorem ipsum text generation library.  Use this if you need
+      some filler text for your application.
+
+      The text is generated using a simple Markov chain, which you can also
+      instantiate to generate your own pieces of pseudo-random text.")
+    (license license:expat)))
+
+(define-public rust-lock-api
+  (package
+    (name "rust-lock-api")
+    (version "0.3.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "lock_api" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1p04271jikw69ja0ap0plrfwm9incf1iny48g0b3ma9k4mw2x4gq"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-owning-ref" ,rust-owning-ref)
+         ("rust-scopeguard" ,rust-scopeguard)
+         ("rust-serde" ,rust-serde))))
+    (home-page
+      "https://github.com/Amanieu/parking_lot")
+    (synopsis
+      "Wrappers to create fully-featured Mutex and RwLock types. Compatible with no_std.")
+    (description
+      "Wrappers to create fully-featured Mutex and RwLock types.  Compatible with no_std.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-log
+  (package
+    (name "rust-log")
+    (version "0.4.7")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "log" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1cx51p86d9s1y2vbyi6jr4wj5cs7nryikygfcpbc42h7ajnvcxf2"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-cfg-if" ,rust-cfg-if)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-serde-test" ,rust-serde-test))))
+    (home-page "https://github.com/rust-lang/log")
+    (synopsis
+      "A lightweight logging facade for Rust")
+    (description
+      "This package provides a lightweight logging facade for Rust")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-maplit ; guix upstreamable
+  (package
+    (name "rust-maplit")
+    (version "1.0.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "maplit" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0hsczmvd6zkqgzqdjp5hfyg7f339n68w83n4pxvnsszrzssbdjq8"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/bluss/maplit")
+    (synopsis "Collection of Map macros")
+    (description "This crate provides a collection of @code{literal} macros for
+@code{HashMap}, @code{HashSet}, @code{BTreeMap}, and @code{BTreeSet.}")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-matches ; guix upstreamable
+  (package
+    (name "rust-matches")
+    (version "0.1.8")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "matches" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "020axl4q7rk9vz90phs7f8jas4imxal9y9kxl4z4v7a6719mrz3z"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/SimonSapin/rust-std-candidates")
+    (synopsis "Macro to evaluate whether an expression matches a pattern.")
+    (description "This package provides a macro to evaluate, as a boolean,
+whether an expression matches a pattern.")
+    (license license:expat)))
+
+(define-public rust-md5 ; guix upstreamable
+  (package
+    (name "rust-md5")
+    (version "0.6.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "md5" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "17b2xm4h4cvxsdjsf3kdrzqv2za60kak961xzi5kmw6g6djcssvy"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/stainless-steel/md5")
+    (synopsis "MD5 hash function in Rust")
+    (description "The package provides the MD5 hash function.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-memchr
+  (package
+    (name "rust-memchr")
+    (version "2.2.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "memchr" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "13j6ji9x9ydpi9grbss106gqqr3xn3bcfp28aydqfa4751qrfmw8"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-libc" ,rust-libc))
+        #:cargo-development-inputs
+        (("rust-quickcheck" ,rust-quickcheck))))
+    (home-page
+      "https://github.com/BurntSushi/rust-memchr")
+    (synopsis "Safe interface to memchr.")
+    (description "Safe interface to memchr.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-memmap
+  (package
+    (name "rust-memmap")
+    (version "0.7.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "memmap" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0ns7kkd1h4pijdkwfvw4qlbbmqmlmzwlq3g2676dcl5vwyazv1b5"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-libc" ,rust-libc)
+         ("rust-winapi" ,rust-winapi))
+        #:cargo-development-inputs
+        (("rust-tempdir" ,rust-tempdir))))
+    (home-page
+      "https://github.com/danburkert/memmap-rs")
+    (synopsis
+      "Cross-platform Rust API for memory-mapped file IO")
+    (description
+      "Cross-platform Rust API for memory-mapped file IO")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-memoffset
+  (package
+    (name "rust-memoffset")
+    (version "0.5.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "memoffset" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0zqpz1apkxvzbi41q07vaxpn3bmvhqqkmg8bbbpbgfrv0gdpaq6f"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-rustc-version" ,rust-rustc-version))))
+    (home-page "https://github.com/Gilnaa/memoffset")
+    (synopsis
+      "offset_of functionality for Rust structs.")
+    (description
+      "offset_of functionality for Rust structs.")
+    (license license:expat)))
+
+(define-public rust-memoffset-0.2
+  (package
+    (inherit rust-memoffset)
+    (name "rust-memoffset")
+    (version "0.2.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "memoffset" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1cvm2z7dy138s302ii7wlzcxbka5a8yfl5pl5di7lbdnw9hw578g"))))))
+
+(define-public rust-no-panic
+  (package
+    (name "rust-no-panic")
+    (version "0.1.10")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "no-panic" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "089gmyxg7kviimqn5nmghm5kngnmi77a0c6fbv0j67jxx7pjhq3r"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn))
+        #:cargo-development-inputs
+        (("rust-tempfile" ,rust-tempfile))))
+    (home-page "https://github.com/dtolnay/no-panic")
+    (synopsis
+      "Attribute macro to require that the compiler prove a function can't ever panic.")
+    (description
+      "Attribute macro to require that the compiler prove a function can't ever panic.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-nodrop ; guix upstreamable
+  (package
+    (name "rust-nodrop")
+    (version "0.1.13")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "nodrop" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0if9ifn6rvar5jirx4b3qh4sl5kjkmcifycvzhxa9j3crkfng5ig"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-nodrop-union" ,rust-nodrop-union))))
+    (home-page "https://github.com/bluss/arrayvec")
+    (synopsis "Wrapper type to inhibit drop (destructor)")
+    (description "This package provides a wrapper type to inhibit drop
+(destructor).  Use @code{std::mem::ManuallyDrop} instead!")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-nodrop-union ; guix upstreamable
+  (package
+    (name "rust-nodrop-union")
+    (version "0.1.10")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "nodrop-union" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0jsnkdn9l8jlmb9h4wssi76sxnyxwnyi00p6y1p2gdq7c1gdw2b7"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/bluss/arrayvec")
+    (synopsis "Wrapper type to inhibit drop (destructor)")
+    (description "This package provides a wrapper type to inhibit drop
+(destructor).  Implementation crate for nodrop, the untagged unions
+implementation (which is unstable / requires nightly).")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-nom
+  (package
+    (name "rust-nom")
+    (version "5.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "nom" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "06snml9wfrvk8k71l4md6gg29jgj4pa8wzsg180q3qr0jf2isxp9"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-lazy-static" ,rust-lazy-static)
+         ("rust-lexical-core" ,rust-lexical-core)
+         ("rust-memchr" ,rust-memchr)
+         ("rust-regex" ,rust-regex))
+        #:cargo-development-inputs
+        (("rust-criterion" ,rust-criterion)
+         ("rust-doc-comment" ,rust-doc-comment)
+         ("rust-jemallocator" ,rust-jemallocator)
+         ("rust-version-check" ,rust-version-check))))
+    (home-page "https://github.com/Geal/nom")
+    (synopsis
+      "A byte-oriented, zero-copy, parser combinators library")
+    (description
+      "This package provides a byte-oriented, zero-copy, parser combinators library")
+    (license license:expat)))
+
+(define-public rust-num-cpus
+  (package
+    (name "rust-num-cpus")
+    (version "1.10.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "num_cpus" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0wrj3zvj6h3q26sqj9zxpd59frjb54n7jhjwf307clq31ic47vxw"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-libc" ,rust-libc))
+        #:cargo-development-inputs
+        (("rust-doc-comment" ,rust-doc-comment))))
+    (home-page
+      "https://github.com/seanmonstar/num_cpus")
+    (synopsis "Get the number of CPUs on a machine.")
+    (description
+      "Get the number of CPUs on a machine.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-num-integer
+  (package
+    (name "rust-num-integer")
+    (version "0.1.41")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "num-integer" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "02dwjjpfbi16c71fq689s4sw3ih52cvfzr5z5gs6qpr5z0g58pmq"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-num-traits" ,rust-num-traits))
+        #:cargo-development-inputs
+        (("rust-autocfg" ,rust-autocfg))))
+    (home-page
+      "https://github.com/rust-num/num-integer")
+    (synopsis "Integer traits and functions")
+    (description "Integer traits and functions")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-num-iter
+  (package
+    (name "rust-num-iter")
+    (version "0.1.39")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "num-iter" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0bhk2qbr3261r6zvfc58lz4spfqjhvdripxgz5mks5rd85r55gbn"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-num-integer" ,rust-num-integer)
+         ("rust-num-traits" ,rust-num-traits))
+        #:cargo-development-inputs
+        (("rust-autocfg" ,rust-autocfg))))
+    (home-page
+      "https://github.com/rust-num/num-iter")
+    (synopsis
+      "External iterators for generic mathematics")
+    (description
+      "External iterators for generic mathematics")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-num-traits
+  (package
+    (name "rust-num-traits")
+    (version "0.2.8")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "num-traits" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0clvrm34rrqc8p6gq5ps5fcgws3kgq5knh7nlqxf2ayarwks9abb"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-autocfg" ,rust-autocfg))))
+    (home-page
+      "https://github.com/rust-num/num-traits")
+    (synopsis
+      "Numeric traits for generic mathematics")
+    (description
+      "Numeric traits for generic mathematics")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-openssl
+  (package
+    (name "rust-openssl")
+    (version "0.10.24")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "openssl" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "05dg25rmg17rl3ykfl2yf69ghfd5z6zf6di38qw1awjvkddbnll1"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bitflags" ,rust-bitflags)
+         ("rust-cfg-if" ,rust-cfg-if)
+         ("rust-foreign-types" ,rust-foreign-types)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-libc" ,rust-libc)
+         ("rust-openssl-sys" ,rust-openssl-sys))
+        #:cargo-development-inputs
+        (("rust-hex" ,rust-hex)
+         ("rust-tempdir" ,rust-tempdir))))
+    (home-page
+      "https://github.com/sfackler/rust-openssl")
+    (synopsis "OpenSSL bindings")
+    (description "OpenSSL bindings")
+    (license license:asl2.0)))
+
+(define-public rust-openssl-src
+  (package
+    (name "rust-openssl-src")
+    (version "111.4.0+1.1.1c")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "openssl-src" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "10s3hvkfk6bi4ba1ssvj914rjs31vs8plssy4kbvsa0w7idkqfkq"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs (("rust-cc" ,rust-cc))))
+    (home-page
+      "https://github.com/alexcrichton/openssl-src-rs")
+    (synopsis
+      "Source of OpenSSL and logic to build it.")
+    (description
+      "Source of OpenSSL and logic to build it.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-openssl-sys
+  (package
+    (name "rust-openssl-sys")
+    (version "0.9.48")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "openssl-sys" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1f05kxx8mai9ac16x1lk0404bymghbbj7vcbqrfwqfr52w131fmm"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-libc" ,rust-libc))
+        #:cargo-development-inputs
+        (("rust-autocfg" ,rust-autocfg)
+         ("rust-cc" ,rust-cc)
+         ("rust-openssl-src" ,rust-openssl-src)
+         ("rust-pkg-config" ,rust-pkg-config)
+         ("rust-vcpkg" ,rust-vcpkg))))
+    (home-page
+      "https://github.com/sfackler/rust-openssl")
+    (synopsis "FFI bindings to OpenSSL")
+    (description "FFI bindings to OpenSSL")
+    (license license:expat)))
+
+(define-public rust-rand-os
+  (package
+    (name "rust-rand-os")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_os" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "06is69f8rfzs620g5b54k6cgy5yaycrsyqg55flyfrsf8g88733f"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-getrandom" ,rust-getrandom)
+         ("rust-rand-core" ,rust-rand-core))))
+    (home-page "https://crates.io/crates/rand_os")
+    (synopsis "OS backed Random Number Generator")
+    (description "OS backed Random Number Generator")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rand-os-0.1
+  (package
+    (inherit rust-rand-os)
+    (name "rust-rand-os")
+    (version "0.1.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_os" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0wahppm0s64gkr2vmhcgwc0lij37in1lgfxg5rbgqlz0l5vgcxbv"))))
+    (arguments
+     `(#:cargo-inputs
+       (("rust-cloudabi" ,rust-cloudabi)
+        ("rust-fuchsia-cprng" ,rust-fuchsia-cprng)
+        ("rust-getrandom" ,rust-getrandom)
+        ("rust-libc" ,rust-libc)
+        ("rust-log" ,rust-log)
+        ("rust-rand-core" ,rust-rand-core-0.4)
+        ("rust-rdrand" ,rust-rdrand-0.4)
+        ("rust-stdweb" ,rust-stdweb)
+        ("rust-wasm-bindgen" ,rust-wasm-bindgen)
+        ("rust-winapi" ,rust-winapi))))))
+
+(define-public rust-packed-simd
+  (package
+    (name "rust-packed-simd")
+    (version "0.3.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "packed_simd" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0822wqf6kzw4ig9ykndg348w2bxkhs3x64brzsvdxh2a1pyajpm8"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-cfg-if" ,rust-cfg-if)
+         ("rust-core-arch" ,rust-core-arch)
+         ("rust-sleef-sys" ,rust-sleef-sys))
+        #:cargo-development-inputs
+        (("rust-arrayvec" ,rust-arrayvec)
+         ("rust-paste" ,rust-paste)
+         ("rust-wasm-bindgen" ,rust-wasm-bindgen)
+         ("rust-wasm-bindgen-test"
+          ,rust-wasm-bindgen-test))))
+    (home-page
+      "https://github.com/rust-lang-nursery/packed_simd")
+    (synopsis "Portable Packed SIMD vectors")
+    (description "Portable Packed SIMD vectors")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-parking-lot
+  (package
+    (name "rust-parking-lot")
+    (version "0.9.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "parking_lot" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0lk2vq3hp88ygpgsrypdr3ss71fidnqbykva0csgxhmn5scb2hpq"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-lock-api" ,rust-lock-api)
+         ("rust-parking-lot-core" ,rust-parking-lot-core))
+        #:cargo-development-inputs
+        (("rust-bincode" ,rust-bincode)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-rand" ,rust-rand)
+         ("rust-rustc-version" ,rust-rustc-version))))
+    (home-page
+      "https://github.com/Amanieu/parking_lot")
+    (synopsis
+      "More compact and efficient implementations of the standard synchronization primitives.")
+    (description
+      "More compact and efficient implementations of the standard synchronization primitives.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-parking-lot-core
+  (package
+    (name "rust-parking-lot-core")
+    (version "0.6.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "parking_lot_core" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0ay67dpnrn68ryyvp720m9i8hzp189fd4d6slrs1lvmcwywv2xmq"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-backtrace" ,rust-backtrace)
+         ("rust-cfg-if" ,rust-cfg-if)
+         ("rust-cloudabi" ,rust-cloudabi)
+         ("rust-libc" ,rust-libc)
+         ("rust-petgraph" ,rust-petgraph)
+         ("rust-redox-syscall" ,rust-redox-syscall)
+         ("rust-smallvec" ,rust-smallvec)
+         ("rust-thread-id" ,rust-thread-id)
+         ("rust-winapi" ,rust-winapi))
+        #:cargo-development-inputs
+        (("rust-rustc-version" ,rust-rustc-version))))
+    (home-page
+      "https://github.com/Amanieu/parking_lot")
+    (synopsis
+      "An advanced API for creating custom synchronization primitives.")
+    (description
+      "An advanced API for creating custom synchronization primitives.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-paste
+  (package
+    (name "rust-paste")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "paste" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0ygs077hlq8qlx5y46sfgrmhlqqgkmvvhn4x3y10arawalf4ljhz"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-paste-impl" ,rust-paste-impl)
+         ("rust-proc-macro-hack" ,rust-proc-macro-hack))))
+    (home-page "https://github.com/dtolnay/paste")
+    (synopsis
+      "Macros for all your token pasting needs")
+    (description
+      "Macros for all your token pasting needs")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-paste-impl
+  (package
+    (name "rust-paste-impl")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "paste-impl" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1rkh8nixmb7r1y0mjnsz62p6r1bqah5ciri7bwhmgcmq4gk9drr6"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro-hack" ,rust-proc-macro-hack)
+         ("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn))))
+    (home-page "https://github.com/dtolnay/paste")
+    (synopsis
+      "Implementation detail of the `paste` crate")
+    (description
+      "Implementation detail of the `paste` crate")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-peeking-take-while ; guix upstreamable
+  (package
+    (name "rust-peeking-take-while")
+    (version "0.1.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "peeking_take_while" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "16bhqr6rdyrp12zv381cxaaqqd0pwysvm1q8h2ygihvypvfprc8r"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/fitzgen/peeking_take_while")
+    (synopsis "Provides the peeking_take_while iterator adaptor method")
+    (description
+      "Like @code{Iterator::take_while}, but calls the predicate on a peeked
+value.  This allows you to use @code{Iterator::by_ref} and
+@code{Iterator::take_while} together, and still get the first value for which
+the @code{take_while} predicate returned false after dropping the @code{by_ref}.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-percent-encoding ; guix upstreamable
+  (package
+    (name "rust-percent-encoding")
+    (version "2.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "percent-encoding" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0m6rkp3iy11la04p6z3492rns6n693pvmx585dvfmzzlzak2hkxs"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/servo/rust-url/")
+    (synopsis "Percent encoding and decoding")
+    (description "This crate provides percent encoding and decoding.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-pest
+  (package
+    (name "rust-pest")
+    (version "2.1.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "pest" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "134686mwxm73asbiads53zfchqvvcrsrsyax2cghfcizmvg8ac4k"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-serde" ,rust-serde)
+         ("rust-serde-json" ,rust-serde-json)
+         ("rust-ucd-trie" ,rust-ucd-trie))))
+    (home-page "https://pest-parser.github.io/")
+    (synopsis "The Elegant Parser")
+    (description "The Elegant Parser")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-pest-derive
+  (package
+    (name "rust-pest-derive")
+    (version "2.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "pest_derive" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1l5jfa6ril71cw5nsiw0r45br54dd8cj2r1nc2d1wq6wb3jilgc3"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-pest" ,rust-pest)
+         ("rust-pest-generator" ,rust-pest-generator))))
+    (home-page "https://pest-parser.github.io/")
+    (synopsis "pest's derive macro")
+    (description "pest's derive macro")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-pest-generator
+  (package
+    (name "rust-pest-generator")
+    (version "2.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "pest_generator" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0ipnv77lqhj4d4fpfxi8m168lcjp482kszaknlardmpgqiv0a4k3"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-pest" ,rust-pest)
+         ("rust-pest-meta" ,rust-pest-meta)
+         ("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn))))
+    (home-page "https://pest-parser.github.io/")
+    (synopsis "pest code generator")
+    (description "pest code generator")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-pest-meta
+  (package
+    (name "rust-pest-meta")
+    (version "2.1.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "pest_meta" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0kaprdz3jis9bjfwhri1zncbsvack5m3gx2g5flspdy7wxnyljgj"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-maplit" ,rust-maplit)
+        ("rust-pest" ,rust-pest)
+        ("rust-sha-1" ,rust-sha-1))))
+    (home-page "https://pest-parser.github.io/")
+    (synopsis "pest meta language parser and validator")
+    (description
+      "pest meta language parser and validator")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-pin-utils ; guix upstreamable
+  (package
+    (name "rust-pin-utils")
+    (version "0.1.0-alpha.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "pin-utils" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "11xmyx00n4m37d546by2rxb8ryxs12v55cc172i3yak1rqccd52q"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/rust-lang-nursery/pin-utils")
+    (synopsis "Utilities for pinning")
+    (description "This crate provides utilities for pinning values on the stack.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-pkg-config
+  (package
+    (name "rust-pkg-config")
+    (version "0.3.14")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "pkg-config" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "135ia995lqzr0gxpk85h0bjxf82kj6hbxdx924sh9jdln6r8wvk7"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-development-inputs
+       (("rust-lazy-static" ,rust-lazy-static))))
+    (inputs
+     `(("pkg-config" ,(@ (gnu packages pkg-config) pkg-config))))
+    (home-page
+      "https://github.com/alexcrichton/pkg-config-rs")
+    (synopsis
+      "A library to run the pkg-config system tool at build time in order to be used in Cargo build scripts.")
+    (description
+      "A library to run the pkg-config system tool at build time in order to be used in Cargo build scripts.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-plain ; guix upstreamable
+  (package
+    (name "rust-plain")
+    (version "0.2.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "plain" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "19n1xbxb4wa7w891268bzf6cbwq4qvdb86bik1z129qb0xnnnndl"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/randomites/plain")
+    (synopsis "Rust library that allows reinterpreting data safely")
+    (description "This package provides a small Rust library that allows users
+ to reinterpret data of certain types safely.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-pocket-resources ; guix upstreamable
+  (package
+    (name "rust-pocket-resources")
+    (version "0.3.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "pocket-resources" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1n2i5vmi8fdbw89wm5nz1ws1z9f1qax911p6ksg4scmdg23z6df1"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/tomaka/pocket-resources")
+    (synopsis "Include resources in your applications")
+    (description "This crate allows you to include resources in your
+applications.")
+    (license license:expat)))
+
+(define-public rust-ppv-lite86 ; guix upstreamable
+  (package
+    (name "rust-ppv-lite86")
+    (version "0.2.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "ppv-lite86" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "06snnv338w341nicfqba2jgln5dsla72ndkgrw7h1dfdb3vgkjz3"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/cryptocorrosion/cryptocorrosion")
+    (synopsis "Implementation of the crypto-simd API for x86")
+    (description "This crate provides an implementation of the crypto-simd API
+for x86.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-proc-macro-nested ; guix upstreamable
+  (package
+    (name "rust-proc-macro-nested")
+    (version "0.1.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "proc-macro-nested" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0bmlksm8vl44wkwihmwr7jsjznhbg0n7aibcw1cs2jgjcp86x6in"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/dtolnay/proc-macro-hack")
+    (synopsis "Support for nested proc-macro-hack invocations")
+    (description "This crate provides support for nested proc-macro-hack
+invocations.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-proptest
+  (package
+    (name "rust-proptest")
+    (version "0.9.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "proptest" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "17sjg8isas4qk85807c4panih9k0lwa4k1mbajhciw5c5q17w56g"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bit-set" ,rust-bit-set)
+         ("rust-bitflags" ,rust-bitflags)
+         ("rust-byteorder" ,rust-byteorder)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-num-traits" ,rust-num-traits)
+         ("rust-quick-error" ,rust-quick-error)
+         ("rust-rand" ,rust-rand)
+         ("rust-rand-chacha" ,rust-rand-chacha)
+         ("rust-rand-xorshift" ,rust-rand-xorshift)
+         ("rust-regex-syntax" ,rust-regex-syntax)
+         ("rust-rusty-fork" ,rust-rusty-fork)
+         ("rust-tempfile" ,rust-tempfile))
+        #:cargo-development-inputs
+        (("rust-regex" ,rust-regex))))
+    (home-page
+      "https://altsysrq.github.io/proptest-book/proptest/index.html")
+    (synopsis
+      "Hypothesis-like property-based testing and shrinking.")
+    (description
+      "Hypothesis-like property-based testing and shrinking.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-proc-macro-hack
+  (package
+    (name "rust-proc-macro-hack")
+    (version "0.5.8")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "proc-macro-hack" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0y2ix90qdvsfks4j1g5qnpyzaa6a4j6sdi35klqvm120378kaalq"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn))
+        #:cargo-development-inputs
+        (("rust-demo-hack" ,rust-demo-hack)
+         ("rust-demo-hack-impl" ,rust-demo-hack-impl))))
+    (home-page
+      "https://github.com/dtolnay/proc-macro-hack")
+    (synopsis
+      "Procedural functionlike!() macros using only Macros 1.1")
+    (description
+      "Procedural functionlike!() macros using only Macros 1.1")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-pulldown-cmark
+  (package
+    (name "rust-pulldown-cmark")
+    (version "0.5.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "pulldown-cmark" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0mq3cgjwxlrv0p1svjg93m1jkybzyfrl9p0jwa76hx1352hks13p"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bitflags" ,rust-bitflags)
+         ("rust-getopts" ,rust-getopts)
+         ("rust-memchr" ,rust-memchr)
+         ("rust-unicase" ,rust-unicase))
+        #:cargo-development-inputs
+        (("rust-criterion" ,rust-criterion)
+         ("rust-html5ever" ,rust-html5ever)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-regex" ,rust-regex)
+         ("rust-tendril" ,rust-tendril))))
+    (home-page
+      "https://github.com/raphlinus/pulldown-cmark")
+    (synopsis "A pull parser for CommonMark")
+    (description
+      "This package provides a pull parser for CommonMark")
+    (license license:expat)))
+
+(define-public rust-quantiles
+  (package
+    (name "rust-quantiles")
+    (version "0.7.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "quantiles" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1wjp16a3d4bmldq9w2wds0q4gjz4mnsqac3g38r6ryr6zc9sh3y1"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive))
+        #:cargo-development-inputs
+        (("rust-quickcheck" ,rust-quickcheck))))
+    (home-page
+      "https://github.com/postmates/quantiles")
+    (synopsis
+      "a collection of approximate quantile algorithms")
+    (description
+      "a collection of approximate quantile algorithms")
+    (license license:expat)))
+
+(define-public rust-quick-error ; guix upstreamable
+  (package
+    (name "rust-quick-error")
+    (version "1.2.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "quick-error" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1w6kgwwv7p7zr0yyg5rb315lkk24bimywklwx7fsvsbwi10bjx4j"))))
+    (build-system cargo-build-system)
+    (home-page "http://github.com/tailhook/quick-error")
+    (synopsis "Macro which makes error types pleasant to write")
+    (description "This crate provides a macro which makes error types pleasant
+to write.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-quickcheck
+  (package
+    (name "rust-quickcheck")
+    (version "0.8.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "quickcheck" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0mkl4wnvvjk4m32aq3an4ayfyvnmbxnzcybfm7n3fbsndb1xjdcw"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-env-logger" ,rust-env-logger)
+         ("rust-log" ,rust-log)
+         ("rust-rand" ,rust-rand-0.6)
+         ("rust-rand-core" ,rust-rand-core))))
+    (home-page
+      "https://github.com/BurntSushi/quickcheck")
+    (synopsis
+      "Automatic property based testing with shrinking.")
+    (description
+      "Automatic property based testing with shrinking.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-rand
+  (package
+    (name "rust-rand")
+    (version "0.7.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0b05gwx8nnxr9bydyjxd1rszdvqnm946ky15z103ssfrhc7anznl"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-getrandom" ,rust-getrandom)
+        ("rust-libc" ,rust-libc)
+        ("rust-log" ,rust-log)
+        ("rust-packed-simd" ,rust-packed-simd)
+        ("rust-rand-chacha" ,rust-rand-chacha)
+        ("rust-rand-core" ,rust-rand-core)
+        ("rust-rand-hc" ,rust-rand-hc)
+        ("rust-rand-pcg" ,rust-rand-pcg))
+       #:cargo-development-inputs
+       (("rust-rand-hc" ,rust-rand-hc)
+        ("rust-rand-isaac" ,rust-rand-isaac)
+        ("rust-rand-pcg" ,rust-rand-pcg)
+        ("rust-rand-xorshift" ,rust-rand-xorshift)
+        ("rust-rand-xoshiro" ,rust-rand-xoshiro))))
+    (home-page "https://crates.io/crates/rand")
+    (synopsis
+      "Random number generators and other randomness functionality.")
+    (description
+      "Random number generators and other randomness functionality.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rand-0.6
+  (package
+    (inherit rust-rand)
+    (name "rust-rand")
+    (version "0.6.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1jl4449jcl4wgmzld6ffwqj5gwxrp8zvx8w573g1z368qg6xlwbd"))))
+    (arguments
+     `(#:cargo-inputs
+       (("rust-autocfg" ,rust-autocfg)
+        ("rust-libc" ,rust-libc)
+        ("rust-log" ,rust-log)
+        ("rust-packed-simd" ,rust-packed-simd)
+        ("rust-rand-chacha" ,rust-rand-chacha-0.1)
+        ("rust-rand-core" ,rust-rand-core-0.4)
+        ("rust-rand-hc" ,rust-rand-hc-0.1)
+        ("rust-rand-isaac" ,rust-rand-isaac-0.1)
+        ("rust-rand-jitter" ,rust-rand-jitter-0.1)
+        ("rust-rand-os" ,rust-rand-os-0.1)
+        ("rust-rand-pcg" ,rust-rand-pcg-0.1)
+        ("rust-rand-xorshift" ,rust-rand-xorshift-0.1)
+        ("rust-winapi" ,rust-winapi))
+       #:cargo-development-inputs
+       (("rust-average" ,rust-average-0.9)
+        ("rust-rand-xoshiro" ,rust-rand-xoshiro-0.1))))))
+
+(define-public rust-rand-0.5
+  (package
+    (inherit rust-rand)
+    (name "rust-rand")
+    (version "0.5.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1fdcgja9167hlzkf4g5daqwp498lwiyq7aqm05whklpbsdyc8666"))))
+    (arguments
+     `(#:cargo-inputs
+       (("rust-cloudabi" ,rust-cloudabi)
+        ("rust-fuchsia-cprng" ,rust-fuchsia-cprng)
+        ("rust-libc" ,rust-libc)
+        ("rust-log" ,rust-log)
+        ("rust-rand-core" ,rust-rand-core-0.3)
+        ("rust-serde" ,rust-serde)
+        ("rust-serde-derive" ,rust-serde-derive)
+        ("rust-stdweb" ,rust-stdweb)
+        ("rust-winapi" ,rust-winapi))
+       #:cargo-development-inputs
+       (("rust-bincode" ,rust-bincode))))))
+
+(define-public rust-rand-0.4
+  (package
+    (inherit rust-rand)
+    (name "rust-rand")
+    (version "0.4.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "14qjfv3gggzhnma20k0sc1jf8y6pplsaq7n1j9ls5c8kf2wl0a2m"))))
+    (arguments
+     `(#:cargo-inputs
+       (("rust-fuchsia-cprng" ,rust-fuchsia-cprng)
+        ("rust-libc" ,rust-libc)
+        ("rust-rand-core" ,rust-rand-core-0.3)
+        ("rust-rdrand" ,rust-rdrand-0.4)
+        ("rust-winapi" ,rust-winapi))))))
+
+(define-public rust-rand-0.3
+  (package
+    (inherit rust-rand)
+    (name "rust-rand")
+    (version "0.3.23")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0v679h38pjjqj5h4md7v2slsvj6686qgcn7p9fbw3h43iwnk1b34"))))
+    (arguments
+     `(#:cargo-inputs
+       (("rust-libc" ,rust-libc)
+        ("rust-rand" ,rust-rand-0.4))))))
+
+(define-public rust-rand-chacha
+  (package
+    (name "rust-rand-chacha")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_chacha" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "178d36jfkc4v95s25scc2vibj2hd2hlk64cs6id4hvzg89whd4z1"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-c2-chacha" ,rust-c2-chacha)
+         ("rust-rand-core" ,rust-rand-core))
+        #:cargo-development-inputs
+        (("rust-autocfg" ,rust-autocfg))))
+    (home-page
+      "https://crates.io/crates/rand_chacha")
+    (synopsis "ChaCha random number generator")
+    (description "ChaCha random number generator")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rand-chacha-0.1
+  (package
+    (inherit rust-rand-chacha)
+    (name "rust-rand-chacha")
+    (version "0.1.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_chacha" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1vxwyzs4fy1ffjc8l00fsyygpiss135irjf7nyxgq2v0lqf3lvam"))))
+    (arguments
+      `(#:cargo-inputs
+        (("rust-autocfg" ,rust-autocfg)
+         ("rust-rand-core" ,rust-rand-core-0.3))))))
+
+(define-public rust-rand-core
+  (package
+    (name "rust-rand-core")
+    (version "0.5.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_core" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1jis94x9ri8xlxki2w2w5k29sjpfwgzkjylg7paganp74hrnhpk1"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-getrandom" ,rust-getrandom)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive))))
+    (home-page "https://crates.io/crates/rand_core")
+    (synopsis
+      "Core random number generator traits and tools for implementation.")
+    (description
+      "Core random number generator traits and tools for implementation.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rand-core-0.4
+  (package
+    (inherit rust-rand-core)
+    (name "rust-rand-core")
+    (version "0.4.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_core" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1h3dbrhi5qgflqnzzd86s48v1dn1l17bmdssi5q170whsm4sbryh"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-serde" ,rust-serde)
+        ("rust-serde-derive" ,rust-serde-derive))))))
+
+(define-public rust-rand-core-0.3
+  (package
+    (inherit rust-rand-core)
+    (name "rust-rand-core")
+    (version "0.3.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_core" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0jzdgszfa4bliigiy4hi66k7fs3gfwi2qxn8vik84ph77fwdwvvs"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-rand-core" ,rust-rand-core-0.4))))))
+
+(define-public rust-rand-distr
+  (package
+    (name "rust-rand-distr")
+    (version "0.2.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_distr" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "08drhcw9k4a79pri3rd1vkv7v9cbm6cf4i342nai39f527c58zn3"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-rand" ,rust-rand))
+        #:cargo-development-inputs
+        (("rust-average" ,rust-average)
+         ("rust-rand-pcg" ,rust-rand-pcg))))
+    (home-page "https://crates.io/crates/rand_distr")
+    (synopsis
+      "Sampling from random number distributions")
+    (description
+      "Sampling from random number distributions")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rand-hc
+  (package
+    (name "rust-rand-hc")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_hc" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0g31sqwpmsirdlwr0svnacr4dbqyz339im4ssl9738cjgfpjjcfa"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-rand-core" ,rust-rand-core))))
+    (home-page "https://crates.io/crates/rand_hc")
+    (synopsis "HC128 random number generator")
+    (description "HC128 random number generator")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rand-hc-0.1
+  (package
+    (inherit rust-rand-hc)
+    (name "rust-rand-hc")
+    (version "0.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_hc" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1i0vl8q5ddvvy0x8hf1zxny393miyzxkwqnw31ifg6p0gdy6fh3v"))))
+    (arguments
+      `(#:cargo-inputs
+        (("rust-rand-core" ,rust-rand-core-0.3))))))
+
+(define-public rust-rand-isaac
+  (package
+    (name "rust-rand-isaac")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_isaac" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0xlb9415x518ffkazxhvk8b04i9i548nva4i5l5s34crvjrv1xld"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-rand-core" ,rust-rand-core)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-bincode" ,rust-bincode))))
+    (home-page "https://crates.io/crates/rand_isaac")
+    (synopsis "ISAAC random number generator")
+    (description "ISAAC random number generator")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rand-isaac-0.1
+  (package
+    (inherit rust-rand-isaac)
+    (name "rust-rand-isaac")
+    (version "0.1.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_isaac" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "027flpjr4znx2csxk7gxb7vrf9c7y5mydmvg5az2afgisp4rgnfy"))))
+    (arguments
+      `(#:cargo-inputs
+        (("rust-rand-core" ,rust-rand-core-0.3)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive))
+        #:cargo-development-inputs
+        (("rust-bincode" ,rust-bincode))))))
+
+(define-public rust-rand-jitter
+  (package
+    (name "rust-rand-jitter")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_jitter" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1mnjbfzj97g788jslz0k77bpsg6qjhz676cibk82ibbvgqp4sy43"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-libc" ,rust-libc)
+         ("rust-log" ,rust-log)
+         ("rust-rand-core" ,rust-rand-core)
+         ("rust-winapi" ,rust-winapi))))
+    (home-page "https://github.com/rust-random/rand")
+    (synopsis
+      "Random number generator based on timing jitter")
+    (description
+      "Random number generator based on timing jitter")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rand-jitter-0.1
+  (package
+    (inherit rust-rand-jitter)
+    (name "rust-rand-jitter")
+    (version "0.1.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_jitter" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "16z387y46bfz3csc42zxbjq89vcr1axqacncvv8qhyy93p4xarhi"))))
+    (arguments
+      `(#:cargo-inputs
+        (("rust-libc" ,rust-libc)
+         ("rust-log" ,rust-log)
+         ("rust-rand-core" ,rust-rand-core-0.4)
+         ("rust-winapi" ,rust-winapi))))))
+
+(define-public rust-rand-pcg
+  (package
+    (name "rust-rand-pcg")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_pcg" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1dljwilv3640l1c5vlg4isiq7qz8gqa2cjbvgv3p0p5wrd36669y"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-autocfg" ,rust-autocfg)
+         ("rust-rand-core" ,rust-rand-core)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-bincode" ,rust-bincode))))
+    (home-page "https://crates.io/crates/rand_pcg")
+    (synopsis
+      "Selected PCG random number generators")
+    (description
+      "Selected PCG random number generators")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rand-pcg-0.1
+  (package
+    (inherit rust-rand-pcg)
+    (name "rust-rand-pcg")
+    (version "0.1.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_pcg" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0i0bdla18a8x4jn1w0fxsbs3jg7ajllz6azmch1zw33r06dv1ydb"))))
+    (arguments
+     `(#:cargo-inputs
+       (("rust-autocfg" ,rust-autocfg)
+        ("rust-rand-core" ,rust-rand-core-0.4)
+        ("rust-serde" ,rust-serde)
+        ("rust-serde" ,rust-serde-derive))
+       #:cargo-development-inputs
+       (("rust-bincode" ,rust-bincode))))))
+
+(define-public rust-rand-xorshift
+  (package
+    (name "rust-rand-xorshift")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_xorshift" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1a6wy76lc5fimm1n9n8fzhp4cfjwfwxh4hx63bg3vlh1d2w1dm3p"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-rand-core" ,rust-rand-core)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-bincode" ,rust-bincode))))
+    (home-page
+      "https://crates.io/crates/rand_xorshift")
+    (synopsis "Xorshift random number generator")
+    (description
+      "Xorshift random number generator")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rand-xorshift-0.1
+  (package
+    (inherit rust-rand-xorshift)
+    (name "rust-rand-xorshift")
+    (version "0.1.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_xorshift" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0p2x8nr00hricpi2m6ca5vysiha7ybnghz79yqhhx6sl4gkfkxyb"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-rand-core" ,rust-rand-core-0.3)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde" ,rust-serde-derive))
+        #:cargo-development-inputs
+        (("rust-bincode" ,rust-bincode))))))
+
+(define-public rust-rand-xoshiro
+  (package
+    (name "rust-rand-xoshiro")
+    (version "0.3.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_xoshiro" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "07w3qgrac8r356lz5vqff42rly6yd9vs3g5lx5pbn13rcmb05rqb"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-byteorder" ,rust-byteorder)
+         ("rust-rand-core" ,rust-rand-core)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-bincode" ,rust-bincode))))
+    (home-page
+      "https://crates.io/crates/rand_xoshiro")
+    (synopsis
+      "Xoshiro, xoroshiro and splitmix64 random number generators")
+    (description
+      "Xoshiro, xoroshiro and splitmix64 random number generators")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rand-xoshiro-0.1
+  (package
+    (inherit rust-rand-xoshiro)
+    (name "rust-rand-xoshiro")
+    (version "0.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rand_xoshiro" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0ac9ha6ll8b6l1930bd99k29jrjpsbpddvr6ycrnbi5rkwb1id03"))))
+    (arguments
+     `(#:cargo-inputs
+       (("rust-byteorder" ,rust-byteorder)
+        ("rust-rand-core" ,rust-rand-core-0.3))
+       #:cargo-development-inputs
+       (("rust-rand" ,rust-rand-0.6))))))
+
+(define-public rust-rayon
+  (package
+    (name "rust-rayon")
+    (version "1.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rayon" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "190hkbcdfvcphyyzkdg52zdia2y9d9yanpm072bmnzbn49p1ic54"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-crossbeam-deque" ,rust-crossbeam-deque-0.6)
+         ("rust-either" ,rust-either)
+         ("rust-rayon-core" ,rust-rayon-core))
+        #:cargo-development-inputs
+        (("rust-doc-comment" ,rust-doc-comment)
+         ("rust-docopt" ,rust-docopt)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-rand" ,rust-rand-0.6)
+         ("rust-rand-xorshift" ,rust-rand-xorshift)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive))))
+    (home-page "https://github.com/rayon-rs/rayon")
+    (synopsis
+      "Simple work-stealing parallelism for Rust")
+    (description
+      "Simple work-stealing parallelism for Rust")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rayon-1.0
+  (package
+    (inherit rust-rayon)
+    (name "rust-rayon")
+    (version "1.0.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rayon" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0wq41f15y05nlarijn9c1vxscxj5sazn3lhd6mmnicj5fzr18f1p"))))
+    (arguments
+      `(#:cargo-inputs
+        (("rust-crossbeam-deque" ,rust-crossbeam-deque-0.2)
+         ("rust-either" ,rust-either)
+         ("rust-rand" ,rust-rand-0.5)
+         ("rust-rayon-core" ,rust-rayon-core))
+        #:cargo-development-inputs
+        (("rust-docopt" ,rust-docopt)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive))))))
+
+(define-public rust-rayon-core
+  (package
+    (name "rust-rayon-core")
+    (version "1.5.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rayon-core" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1ljva6blaf1wmzvg77h1i9pd0hsmsbbcmdk7sjbw7h2s8gw0vgpb"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-crossbeam-deque" ,rust-crossbeam-deque-0.6)
+         ("rust-crossbeam-queue" ,rust-crossbeam-queue)
+         ("rust-crossbeam-utils" ,rust-crossbeam-utils)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-num-cpus" ,rust-num-cpus))
+        #:cargo-development-inputs
+        (("rust-libc" ,rust-libc)
+         ("rust-rand" ,rust-rand)
+         ("rust-rand-xorshift" ,rust-rand-xorshift)
+         ("rust-scoped-tls" ,rust-scoped-tls))))
+    (home-page "https://github.com/rayon-rs/rayon")
+    (synopsis "Core APIs for Rayon")
+    (description "Core APIs for Rayon")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rdrand
+  (package
+    (name "rust-rdrand")
+    (version "0.5.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rdrand" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "02dsyibvl1iygkmljr0ld9vjyp525q4mjy5j9yazrrkyvhvw7gvp"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-rand-core" ,rust-rand-core))))
+    (home-page
+      "https://github.com/nagisa/rust_rdrand/")
+    (synopsis
+      "An implementation of random number generator based on rdrand and rdseed instructions")
+    (description
+      "An implementation of random number generator based on rdrand and rdseed instructions")
+    (license license:isc)))
+
+(define-public rust-rdrand-0.4
+  (package
+    (inherit rust-rdrand)
+    (name "rust-rdrand")
+    (version "0.4.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rdrand" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1cjq0kwx1bk7jx3kzyciiish5gqsj7620dm43dc52sr8fzmm9037"))))
+    (arguments
+      `(#:cargo-inputs
+        (("rust-rand-core" ,rust-rand-core-0.3))))))
+
+(define-public rust-redox-syscall ; guix upstreamable
+  (package
+    (name "rust-redox-syscall")
+    (version "0.1.56")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "redox_syscall" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "110y7dyfm2vci4x5vk7gr0q551dvp31npl99fnsx2fb17wzwcf94"))))
+    (build-system cargo-build-system)
+    (home-page "https://gitlab.redox-os.org/redox-os/syscall")
+    (synopsis "Rust library to access raw Redox system calls")
+    (description "This package provides a Rust library to access raw Redox
+system calls.")
+    (license license:expat)))
+
+(define-public rust-redox-users
+  (package
+    (name "rust-redox-users")
+    (version "0.3.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "redox_users" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0a1q5jv76vj1mwmqf2mmhknmkpw5wndx91gjfgg7vs8p79621r9z"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-argon2rs" ,rust-argon2rs)
+         ("rust-failure" ,rust-failure)
+         ("rust-rand-os" ,rust-rand-os)
+         ("rust-redox-syscall" ,rust-redox-syscall))))
+    (home-page
+      "https://gitlab.redox-os.org/redox-os/users")
+    (synopsis
+      "A Rust library to access Redox users and groups functionality")
+    (description
+      "This package provides a Rust library to access Redox users and groups functionality")
+    (license #f)))
+
+(define-public rust-ref-cast
+  (package
+    (name "rust-ref-cast")
+    (version "0.2.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "ref-cast" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0jgj1zxaikqm030flpifbp517fy4z21lly6ysbwyciii39bkzcf1"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-ref-cast-impl" ,rust-ref-cast-impl))))
+    (home-page "https://github.com/dtolnay/ref-cast")
+    (synopsis
+      "Safely cast &T to &U where the struct U contains a single field of type T.")
+    (description
+      "Safely cast &T to &U where the struct U contains a single field of type T.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-ref-cast-impl
+  (package
+    (name "rust-ref-cast-impl")
+    (version "0.2.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "ref-cast-impl" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0hw0frpzna5rf5szix56zyzd0vackcb3svj94ndj629xi75dkb32"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn))))
+    (home-page "https://github.com/dtolnay/ref-cast")
+    (synopsis
+      "Derive implementation for ref_cast::RefCast.")
+    (description
+      "Derive implementation for ref_cast::RefCast.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-regex
+  (package
+    (name "rust-regex")
+    (version "1.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "regex" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1k6jpx0bqlg6vb8rsdnlmcw2szczbl51j047w3blpa4qzn6xl8vb"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-aho-corasick" ,rust-aho-corasick)
+         ("rust-memchr" ,rust-memchr)
+         ("rust-regex-syntax" ,rust-regex-syntax)
+         ("rust-thread-local" ,rust-thread-local)
+         ("rust-utf8-ranges" ,rust-utf8-ranges))
+        #:cargo-development-inputs
+        (("rust-doc-comment" ,rust-doc-comment)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-quickcheck" ,rust-quickcheck)
+         ("rust-rand" ,rust-rand))))
+    (home-page "https://github.com/rust-lang/regex")
+    (synopsis
+      "An implementation of regular expressions for Rust. This implementation uses
+      finite automata and guarantees linear time matching on all inputs.")
+    (description
+      "An implementation of regular expressions for Rust.  This implementation uses
+      finite automata and guarantees linear time matching on all inputs.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-regex-syntax
+  (package
+    (name "rust-regex-syntax")
+    (version "0.6.10")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "regex-syntax" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0p47lf38yj2g2fnmvnraccqlxwk35zr76hlnqi8yva932nzqam6d"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-ucd-util" ,rust-ucd-util))))
+    (home-page "https://github.com/rust-lang/regex")
+    (synopsis "A regular expression parser.")
+    (description
+      "This package provides a regular expression parser.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-remove-dir-all
+  (package
+    (name "rust-remove-dir-all")
+    (version "0.5.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "remove_dir_all" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0bkrlyg26mgizpiy1yb2hhpgscxcag8r5fnckqsvk25608vzm0sa"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-winapi" ,rust-winapi))
+        #:cargo-development-inputs
+        (("rust-doc-comment" ,rust-doc-comment))))
+    (home-page
+      "https://github.com/XAMPPRocky/remove_dir_all.git")
+    (synopsis
+      "A safe, reliable implementation of remove_dir_all for Windows")
+    (description
+      "This package provides a safe, reliable implementation of remove_dir_all for Windows")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-ron
+  (package
+    (name "rust-ron")
+    (version "0.5.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "ron" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1mb2bavvp8jg5wx0kx9n45anrsbjwhjzddim987bjaa11hg45kif"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-base64" ,rust-base64)
+         ("rust-bitflags" ,rust-bitflags)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-serde-bytes" ,rust-serde-bytes)
+         ("rust-serde-json" ,rust-serde-json))))
+    (home-page "https://github.com/ron-rs/ron")
+    (synopsis "Rusty Object Notation")
+    (description "Rusty Object Notation")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rustc-demangle
+  (package
+    (name "rust-rustc-demangle")
+    (version "0.1.15")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rustc-demangle" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1brqf2bknkxsdzn3kd3wfifvzfc33bmvdy9r1k6fp4a8dz7xrx57"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-compiler-builtins"
+          ,rust-compiler-builtins)
+         ("rust-rustc-std-workspace-core"
+          ,rust-rustc-std-workspace-core))))
+    (home-page
+      "https://github.com/alexcrichton/rustc-demangle")
+    (synopsis "Rust compiler symbol demangling.")
+    (description
+      "Rust compiler symbol demangling.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rustc-serialize
+  (package
+    (name "rust-rustc-serialize")
+    (version "0.3.24")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rustc-serialize" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1nkg3vasg7nk80ffkazizgiyv3hb1l9g3d8h17cajbkx538jiwfw"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-rand" ,rust-rand-0.3))))
+    (home-page
+      "https://github.com/rust-lang/rustc-serialize")
+    (synopsis
+      "Generic serialization/deserialization support corresponding to the `derive(RustcEncodable, RustcDecodable)` mode in the compiler. Also includes support for hex, base64, and json encoding and decoding.")
+    (description
+      "Generic serialization/deserialization support corresponding to the `derive(RustcEncodable, RustcDecodable)` mode in the compiler. Also includes support for hex, base64, and json encoding and decoding.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rustc-std-workspace-core ; guix upstreamable
+  (package
+    (name "rust-rustc-std-workspace-core")
+    (version "1.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rustc-std-workspace-core" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1309xhwyai9xpz128xrfjqkmnkvgjwddznmj7brbd8i8f58zamhr"))))
+    (build-system cargo-build-system)
+    (home-page "https://crates.io/crates/rustc-std-workspace-core")
+    (synopsis "Explicitly empty crate for rust-lang/rust integration")
+    (description "This crate provides an explicitly empty crate for
+rust-lang/rust integration.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rustc-test
+  (package
+    (name "rust-rustc-test")
+    (version "0.3.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rustc-test" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0a27mlcg0ck0hgsdvwk792x9z1k1qq1wj091f1l5yggbdbcsnx5w"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-getopts" ,rust-getopts)
+         ("rust-libc" ,rust-libc)
+         ("rust-rustc-serialize" ,rust-rustc-serialize)
+         ("rust-term" ,rust-term)
+         ("rust-time" ,rust-time))
+        #:cargo-development-inputs
+        (("rust-rustc-version" ,rust-rustc-version))))
+    (home-page
+      "https://github.com/SimonSapin/rustc-test")
+    (synopsis
+      "A fork of Rustâ\x80\x99s `test` crate that doesnâ\x80\x99t require unstable language features.")
+    (description
+      "This package provides a fork of Rustâ\x80\x99s `test` crate that doesnâ\x80\x99t require unstable language features.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-rustc-version
+  (package
+    (name "rust-rustc-version")
+    (version "0.2.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rustc_version" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "02h3x57lcr8l2pm0a645s9whdh33pn5cnrwvn5cb57vcrc53x3hk"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs (("rust-semver" ,rust-semver))))
+    (home-page
+      "https://github.com/Kimundi/rustc-version-rs")
+    (synopsis
+      "A library for querying the version of a installed rustc compiler")
+    (description
+      "This package provides a library for querying the version of a installed rustc compiler")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-ryu
+  (package
+    (name "rust-ryu")
+    (version "1.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "ryu" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "15r9z2wzgbj04pks4jz7y6wif5xqhf1wqkl2nd7qrvn08ys68969"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-no-panic" ,rust-no-panic))
+        #:cargo-development-inputs
+        (("rust-num-cpus" ,rust-num-cpus)
+         ("rust-rand" ,rust-rand))))
+    (home-page "https://github.com/dtolnay/ryu")
+    (synopsis
+      "Fast floating point to string conversion")
+    (description
+      "Fast floating point to string conversion")
+    (license (list license:asl2.0
+                   license:boost1.0))))
+
+(define-public rust-same-file
+  (package
+    (name "rust-same-file")
+    (version "1.0.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "same-file" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "08a4zy10pjindf2rah320s6shgswk13mqw7s61m8i1y1xpf8spjq"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-winapi-util" ,rust-winapi-util))))
+    (home-page
+      "https://github.com/BurntSushi/same-file")
+    (synopsis
+      "A simple crate for determining whether two file paths point to the same file.")
+    (description
+      "This package provides a simple crate for determining whether two file paths point to the same file.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-scoped-tls ; guix upstreamable
+  (package
+    (name "rust-scoped-tls")
+    (version "1.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "scoped-tls" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1hj8lifzvivdb1z02lfnzkshpvk85nkgzxsy2hc0zky9wf894spa"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/alexcrichton/scoped-tls")
+    (synopsis "Rust library providing the old standard library's scoped_thread_local")
+    (description "This crate provides a library implementation of the standard
+library's old @code{scoped_thread_local!} macro for providing scoped access to
+@dfn{thread local storage} (TLS) so any type can be stored into TLS.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-scopeguard ; guix upstreamable
+  (package
+    (name "rust-scopeguard")
+    (version "1.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "scopeguard" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "03aay84r1f6w87ckbpj6cc4rnsxkxcfs13n5ynxjia0qkgjiabml"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/bluss/scopeguard")
+    (synopsis "Scope guard which will run a closure even out of scope")
+    (description "This package provides a RAII scope guard that will run a
+given closure when it goes out of scope, even if the code between panics
+(assuming unwinding panic).  Defines the macros @code{defer!},
+@code{defer_on_unwind!}, @code{defer_on_success!} as shorthands for guards
+with one of the implemented strategies.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-scopeguard-0.3
+  (package
+    (inherit rust-scopeguard)
+    (name "rust-scopeguard")
+    (version "0.3.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "scopeguard" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "09sy9wbqp409pkwmqni40qmwa99ldqpl48pp95m1xw8sc19qy9cl"))))))
+
+(define-public rust-scroll
+  (package
+    (name "rust-scroll")
+    (version "0.9.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "scroll" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "10q3w86bn22xrjlfg1c90dfi9c26qjkzn26nad0i9z8pxwad311g"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-scroll-derive" ,rust-scroll-derive)
+         ("rust-rustc-version" ,rust-rustc-version))
+        #:cargo-development-inputs
+        (("rust-byteorder" ,rust-byteorder)
+         ("rust-rayon" ,rust-rayon))))
+    (home-page "https://github.com/m4b/scroll")
+    (synopsis
+      "A suite of powerful, extensible, generic, endian-aware Read/Write traits for byte buffers")
+    (description
+      "This package provides a suite of powerful, extensible, generic, endian-aware Read/Write traits for byte buffers")
+    (license license:expat)))
+
+(define-public rust-scroll-derive
+  (package
+    (name "rust-scroll-derive")
+    (version "0.9.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "scroll_derive" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1jqg5mm8nvii6avl1z1rc89agzh2kwkppgpsnwfakxg78mnaj6lg"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn))
+        #:cargo-development-inputs
+        (("rust-scroll" ,rust-scroll))))
+    (home-page
+      "https://github.com/m4b/scroll_derive")
+    (synopsis
+      "A macros 1.1 derive implementation for Pread and Pwrite traits from the scroll crate")
+    (description
+      "This package provides a macros 1.1 derive implementation for Pread and Pwrite traits from the scroll crate")
+    (license license:expat)))
+
+(define-public rust-seahash ; guix upstreamable
+  (package
+    (name "rust-seahash")
+    (version "3.0.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "seahash" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1pr8ijnxnp68ki4m4740yc5mr01zijf86yx07wbsqzwiyhghdmhq"))))
+    (build-system cargo-build-system)
+    (home-page "https://gitlab.redox-os.org/redox-os/seahash")
+    (synopsis "Hash function with proven statistical guarantees")
+    (description "This package provides a blazingly fast, portable hash
+function with proven statistical guarantees.")
+    (license license:expat)))
+
+(define-public rust-select-rustc
+  (package
+    (name "rust-select-rustc")
+    (version "0.1.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "select-rustc" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0daqd56smi93g59nz43n4mh3d8whr6j5pa8dmwlf8bd76mdy3cpx"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn))))
+    (home-page
+      "https://github.com/dtolnay/select-rustc")
+    (synopsis
+      "Conditional compilation according to rustc compiler version")
+    (description
+      "Conditional compilation according to rustc compiler version")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-semver
+  (package
+    (name "rust-semver")
+    (version "0.9.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "semver" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "00q4lkcj0rrgbhviv9sd4p6qmdsipkwkbra7rh11jrhq5kpvjzhx"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-semver-parser" ,rust-semver-parser-0.7)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-crates-index" ,rust-crates-index)
+         ("rust-serde-derive" ,rust-serde-derive)
+         ("rust-serde-json" ,rust-serde-json)
+         ("rust-tempdir" ,rust-tempdir))))
+    (home-page "https://docs.rs/crate/semver/")
+    (synopsis
+      "Semantic version parsing and comparison.")
+    (description
+      "Semantic version parsing and comparison.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-semver-parser ; guix upstreamable
+  (package
+    (name "rust-semver-parser")
+    (version "0.9.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "semver-parser" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1ahqhvgpzhcsd28id7xnrjv4419i9yyalhm7d7zi430qx0hi2vml"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/steveklabnik/semver-parser")
+    (synopsis "Parsing of the semver spec")
+    (description "This package provides for parsing of the semver spec.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-semver-parser-0.7
+  (package
+    (inherit rust-semver-parser)
+    (name "rust-semver-parser")
+    (version "0.7.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "semver-parser" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "18vhypw6zgccnrlm5ps1pwa0khz7ry927iznpr88b87cagr1v2iq"))))))
+
+(define-public rust-serde
+  (package
+    (name "rust-serde")
+    (version "1.0.97")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "serde" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0wlvfs82flb3di86m3nzf1m4vkc78vqcwrk865s0ldhrvgz3ssyl"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-serde-derive" ,rust-serde-derive))
+        #:cargo-development-inputs
+        (("rust-serde-derive" ,rust-serde-derive))))
+    (home-page "https://serde.rs")
+    (synopsis
+      "A generic serialization/deserialization framework")
+    (description
+      "This package provides a generic serialization/deserialization framework")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-serde-big-array
+  (package
+    (name "rust-serde-big-array")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "serde-big-array" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0gkyqxk760mp1lfcg6lhjk95ajc89nr0qdd0vl4ic0g8pyxcy9mr"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive))
+        #:cargo-development-inputs
+        (("rust-serde-json" ,rust-serde-json))))
+    (home-page
+      "https://github.com/est31/serde-big-array")
+    (synopsis "Big array helper for serde.")
+    (description "Big array helper for serde.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-serde-bytes
+  (package
+    (name "rust-serde-bytes")
+    (version "0.11.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "serde_bytes" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0sc5n336i7q4fiij4l8f892zcirgybrbxzl8bp51qxzqdvdlgzxa"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-bincode" ,rust-bincode)
+         ("rust-serde-derive" ,rust-serde-derive)
+         ("rust-serde-test" ,rust-serde-test))))
+    (home-page "https://github.com/serde-rs/bytes")
+    (synopsis
+      "Optimized handling of `&[u8]` and `Vec<u8>` for Serde")
+    (description
+      "Optimized handling of `&[u8]` and `Vec<u8>` for Serde")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-serde-cbor
+  (package
+    (name "rust-serde-cbor")
+    (version "0.10.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "serde_cbor" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0jcb4j637vdlqk2z38jixaqmp6f92h36r17kclv5brjay32911ii"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-byteorder" ,rust-byteorder)
+         ("rust-half" ,rust-half)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-serde-derive" ,rust-serde-derive))))
+    (home-page "https://github.com/pyfisch/cbor")
+    (synopsis "CBOR support for serde.")
+    (description "CBOR support for serde.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-serde-derive
+  (package
+    (name "rust-serde-derive")
+    (version "1.0.97")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "serde_derive" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0zq2qm2gabmpa57wxfxb09jl41nxccsk454715xjabzymlh0han2"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn))
+        #:cargo-development-inputs
+        (("rust-serde" ,rust-serde))))
+    (home-page "https://serde.rs")
+    (synopsis
+      "Macros 1.1 implementation of #[derive(Serialize, Deserialize)]")
+    (description
+      "Macros 1.1 implementation of #[derive(Serialize, Deserialize)]")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-serde-json
+  (package
+    (name "rust-serde-json")
+    (version "1.0.40")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "serde_json" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "010pa89zx07aqx1cwgw2a603wcp3q5n2iy0k71ppqbr8kwi4j705"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-indexmap" ,rust-indexmap)
+        ("rust-itoa" ,rust-itoa)
+        ("rust-ryu" ,rust-ryu)
+        ("rust-serde" ,rust-serde))
+       #:cargo-development-inputs
+       (("rust-automod" ,rust-automod)
+        ("rust-select-rustc" ,rust-select-rustc)
+        ("rust-serde-bytes" ,rust-serde-bytes)
+        ("rust-serde-derive" ,rust-serde-derive)
+        ("rust-serde-stacker" ,rust-serde-stacker)
+        ("rust-trybuild" ,rust-trybuild))))
+    (home-page "https://github.com/serde-rs/json")
+    (synopsis "A JSON serialization file format")
+    (description
+      "This package provides a JSON serialization file format")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-serde-json-1.0.39
+  (package
+    (inherit rust-serde-json)
+    (name "rust-serde-json")
+    (version "1.0.39")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "serde_json" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "03fl9l680gij0hrsr2csfm8nm858igvfy05czbdkzm54siqsl8ss"))))))
+
+(define-public rust-serde-stacker
+  (package
+    (name "rust-serde-stacker")
+    (version "0.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "serde_stacker" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1jn54i5m1mlc6nm47f96k85fgjs9mhpbbqa4dvd5xjbivkdw55ic"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-serde" ,rust-serde)
+         ("rust-stacker" ,rust-stacker))
+        #:cargo-development-inputs
+        (("rust-serde-json" ,rust-serde-json))))
+    (home-page
+      "https://github.com/dtolnay/serde-stacker")
+    (synopsis
+      "Serde adapter that avoids stack overflow by dynamically growing the stack")
+    (description
+      "Serde adapter that avoids stack overflow by dynamically growing the stack")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-serde-test
+  (package
+    (name "rust-serde-test")
+    (version "1.0.97")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "serde_test" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0i17jdgy18rcp19v6h4shim27l99q3vc7pzr2xaa2g0rjq9p6lr2"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive))))
+    (home-page "https://serde.rs")
+    (synopsis
+      "Token De/Serializer for testing De/Serialize implementations")
+    (description
+      "Token De/Serializer for testing De/Serialize implementations")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-serde-yaml
+  (package
+    (name "rust-serde-yaml")
+    (version "0.8.9")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "serde_yaml" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "10mmjpnshgrwij01a13679nxy1hnh5yfr0343kh0y9p5j2d8mc1q"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-dtoa" ,rust-dtoa)
+         ("rust-linked-hash-map" ,rust-linked-hash-map)
+         ("rust-serde" ,rust-serde)
+         ("rust-yaml-rust" ,rust-yaml-rust))
+        #:cargo-development-inputs
+        (("rust-serde-derive" ,rust-serde-derive)
+         ("rust-unindent" ,rust-unindent)
+         ("rust-version-sync" ,rust-version-sync))))
+    (home-page
+      "https://github.com/dtolnay/serde-yaml")
+    (synopsis "YAML support for Serde")
+    (description "YAML support for Serde")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-sha-1
+  (package
+    (name "rust-sha-1")
+    (version "0.8.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "sha-1" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0s6fdy5wp3x4h2z4fcl2d9vjvrpzr87v4h49r51xcq8nm4qj35i3"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-block-buffer" ,rust-block-buffer)
+         ("rust-digest" ,rust-digest)
+         ("rust-fake-simd" ,rust-fake-simd)
+         ("rust-opaque-debug" ,rust-opaque-debug)
+         ("rust-sha1-asm" ,rust-sha1-asm))
+        #:cargo-development-inputs
+        (("rust-digest" ,rust-digest)
+         ("rust-hex-literal" ,rust-hex-literal))))
+    (home-page
+      "https://github.com/RustCrypto/hashes")
+    (synopsis "SHA-1 hash function")
+    (description "SHA-1 hash function")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-sha1
+  (package
+    (name "rust-sha1")
+    (version "0.6.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "sha1" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "03gs2q4m67rn2p8xcdfxhip6mpgahdwm12bnb3vh90ahv9grhy95"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-openssl" ,rust-openssl)
+         ("rust-rand" ,rust-rand)
+         ("rust-serde-json" ,rust-serde-json))))
+    (home-page
+      "https://github.com/mitsuhiko/rust-sha1")
+    (synopsis
+      "Minimal implementation of SHA1 for Rust.")
+    (description
+      "Minimal implementation of SHA1 for Rust.")
+    (license license:bsd-3)))
+
+(define-public rust-shlex ; guix upstreamable
+  (package
+    (name "rust-shlex")
+    (version "0.1.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "shlex" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1lmv6san7g8dv6jdfp14m7bdczq9ss7j7bgsfqyqjc3jnjfippvz"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/comex/rust-shlex")
+    (synopsis "Split a string into shell words, like Python's shlex")
+    (description "This crate provides a method to split a string into shell
+words, like Python's shlex.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-slab ; guix upstreamable
+  (package
+    (name "rust-slab")
+    (version "0.4.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "slab" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1y59xsa27jk84sxzswjk60xcjf8b4fm5960jwpznrrcmasyva4f1"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/carllerche/slab")
+    (synopsis "Pre-allocated storage for a uniform data type")
+    (description "This create provides a pre-allocated storage for a uniform
+data type.")
+    (license license:expat)))
+
+(define-public rust-sleef-sys
+  (package
+    (name "rust-sleef-sys")
+    (version "0.1.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "sleef-sys" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1881q2yc17j2m1yvh01447c93ws1mspnrj3k2nbvwbvcm8z81kkv"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-cfg-if" ,rust-cfg-if)
+         ("rust-libc" ,rust-libc))
+        #:cargo-development-inputs
+        (("rust-bindgen" ,rust-bindgen)
+         ("rust-cmake" ,rust-cmake)
+         ("rust-env-logger" ,rust-env-logger))))
+    (home-page "https://github.com/gnzlbg/sleef-sys")
+    (synopsis
+      "Rust FFI bindings to the SLEEF Vectorized Math Library")
+    (description
+      "Rust FFI bindings to the SLEEF Vectorized Math Library")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-slog
+  (package
+    (name "rust-slog")
+    (version "2.5.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "slog" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "16bv6zrdn1sm315vbnia02g31xvsmbjyz5gv3z0vrgxdli0cdj8w"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-erased-serde" ,rust-erased-serde))))
+    (home-page "https://github.com/slog-rs/slog")
+    (synopsis
+      "Structured, extensible, composable logging for Rust")
+    (description
+      "Structured, extensible, composable logging for Rust")
+    (license (list license:asl2.0
+                   license:mpl2.0
+                   license:expat))))
+
+(define-public rust-spin ; guix upstreamable
+  (package
+    (name "rust-spin")
+    (version "0.5.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "spin" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0m9clchsj0rf13bggsgvbv9haiy0f6rhvnvkpvkk8720a5pkydj4"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/mvdnes/spin-rs.git")
+    (synopsis "Synchronization primitives based on spinning")
+    (description "This crate provides synchronization primitives based on
+spinning.  They may contain data, are usable without @code{std},and static
+initializers are available.")
+    (license license:expat)))
+
+(define-public rust-stacker
+  (package
+    (name "rust-stacker")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "stacker" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0js0axz5nla1mkr2dm2vrv9rj964ng1lrv4l43sqlnfgawplhygv"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-cfg-if" ,rust-cfg-if)
+         ("rust-libc" ,rust-libc)
+         ("rust-winapi" ,rust-winapi)
+         ("rust-cc" ,rust-cc))))
+    (home-page
+      "https://github.com/alexcrichton/stacker")
+    (synopsis
+      "A stack growth library useful when implementing deeply recursive algorithms that
+      may accidentally blow the stack.")
+    (description
+      "This package provides a stack growth library useful when implementing deeply recursive algorithms that
+      may accidentally blow the stack.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-stdweb
+  (package
+    (name "rust-stdweb")
+    (version "0.4.18")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "stdweb" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1srsjarj36f57ibr63n70bgy250yb72a73g14b80wh7piki0r356"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-discard" ,rust-discard)
+         ("rust-futures-channel-preview"
+          ,rust-futures-channel-preview)
+         ("rust-futures-core-preview"
+          ,rust-futures-core-preview)
+         ("rust-futures-executor-preview"
+          ,rust-futures-executor-preview)
+         ("rust-futures-util-preview"
+          ,rust-futures-util-preview)
+         ("rust-rustc-version" ,rust-rustc-version)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-json" ,rust-serde-json)
+         ("rust-stdweb-derive" ,rust-stdweb-derive)
+         ("rust-stdweb-internal-macros"
+          ,rust-stdweb-internal-macros)
+         ("rust-stdweb-internal-runtime"
+          ,rust-stdweb-internal-runtime)
+         ("rust-wasm-bindgen" ,rust-wasm-bindgen))
+        #:cargo-development-inputs
+        (("rust-rustc-version" ,rust-rustc-version)
+         ("rust-serde-derive" ,rust-serde-derive)
+         ("rust-serde-json" ,rust-serde-json)
+         ("rust-stdweb-internal-test-macro"
+          ,rust-stdweb-internal-test-macro)
+         ("rust-wasm-bindgen-test"
+          ,rust-wasm-bindgen-test))))
+    (home-page "https://github.com/koute/stdweb")
+    (synopsis
+      "A standard library for the client-side Web")
+    (description
+      "This package provides a standard library for the client-side Web")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-stdweb-derive
+  (package
+    (name "rust-stdweb-derive")
+    (version "0.5.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "stdweb-derive" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0c1rxx6rqcc4iic5hx320ki3vshpi8k58m5600iqzq4x2zcyn88f"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive)
+         ("rust-syn" ,rust-syn))))
+    (home-page "https://github.com/koute/stdweb")
+    (synopsis "Derive macros for the `stdweb` crate")
+    (description
+      "Derive macros for the `stdweb` crate")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-stdweb-internal-macros
+  (package
+    (name "rust-stdweb-internal-macros")
+    (version "0.2.7")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "stdweb-internal-macros" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1yjrmkc6sb1035avic383pa3avk2s9k3n17yjcza8yb9nw47v3z6"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-base-x" ,rust-base-x)
+         ("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive)
+         ("rust-serde-json" ,rust-serde-json)
+         ("rust-sha1" ,rust-sha1)
+         ("rust-syn" ,rust-syn))))
+    (home-page "https://github.com/koute/stdweb")
+    (synopsis
+      "Internal procedural macros for the `stdweb` crate")
+    (description
+      "Internal procedural macros for the `stdweb` crate")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-stdweb-internal-runtime ; guix upstreamable
+  (package
+    (name "rust-stdweb-internal-runtime")
+    (version "0.1.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "stdweb-internal-runtime" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1nhpyra7glbwcpakhpj5a3d7h7kx1ynif473nzshmk226m91f8ym"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/koute/stdweb")
+    (synopsis "Internal runtime for the @code{stdweb} crate")
+    (description "This crate provides internal runtime for the @code{stdweb}
+crate.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-stdweb-internal-test-macro
+  (package
+    (name "rust-stdweb-internal-test-macro")
+    (version "0.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "stdweb-internal-test-macro" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "12rrm7p77xnm3xacgn3rgniiyyjb4gq7902wpbljsvbx045z69l2"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote))))
+    (home-page "https://github.com/koute/stdweb")
+    (synopsis "Internal crate of the `stdweb` crate")
+    (description
+      "Internal crate of the `stdweb` crate")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-stream-cipher
+  (package
+    (name "rust-stream-cipher")
+    (version "0.3.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "stream-cipher" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1g1nd8r6pph70rzk5yyvg7a9ji7pkap9ddiqpp4v9xa9ys0bqqc8"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-blobby" ,rust-blobby)
+         ("rust-generic-array" ,rust-generic-array))))
+    (home-page
+      "https://github.com/RustCrypto/traits")
+    (synopsis "Stream cipher traits")
+    (description "Stream cipher traits")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-streaming-stats
+  (package
+    (name "rust-streaming-stats")
+    (version "0.2.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "streaming-stats" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0l7xz4g6709s80zqpvlhrg0qhgz64r94cwhmfsg8xhabgznbp2px"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-num-traits" ,rust-num-traits))))
+    (home-page
+      "https://github.com/BurntSushi/rust-stats")
+    (synopsis
+      "Experimental crate for computing basic statistics on streams.")
+    (description
+      "Experimental crate for computing basic statistics on streams.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-strsim ; guix upstreamable
+  (package
+    (name "rust-strsim")
+    (version "0.9.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "strsim" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1xphwhf86yxxmcpvm4mikj8ls41f6nf7gqyjm98b74mfk81h6b03"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/dguo/strsim-rs")
+    (synopsis "Rust implementations of string similarity metrics")
+    (description "This crate includes implementations of string similarity
+metrics.  It includes Hamming, Levenshtein, OSA, Damerau-Levenshtein, Jaro,
+and Jaro-Winkler.")
+    (license license:expat)))
+
+(define-public rust-strsim-0.8
+  (package
+    (inherit rust-strsim)
+    (name "rust-strsim")
+    (version "0.8.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "strsim" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0sjsm7hrvjdifz661pjxq5w4hf190hx53fra8dfvamacvff139cf"))))))
+
+(define-public rust-structopt
+  (package
+    (name "rust-structopt")
+    (version "0.2.18")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "structopt" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1mvfv1l8vp3y402fkl2wcl34hi7gmr4bqha13dfz2xf3kjzwvhhn"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-clap" ,rust-clap)
+         ("rust-structopt-derive" ,rust-structopt-derive))))
+    (home-page
+      "https://github.com/TeXitoi/structopt")
+    (synopsis
+      "Parse command line argument by defining a struct.")
+    (description
+      "Parse command line argument by defining a struct.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-structopt-derive
+  (package
+    (name "rust-structopt-derive")
+    (version "0.2.18")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "structopt-derive" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "01sis9z5kqmyhvzbnmlzpdxcry99a0b9blypksgnhdsbm1hh40ak"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-heck" ,rust-heck)
+         ("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn))))
+    (home-page
+      "https://github.com/TeXitoi/structopt")
+    (synopsis
+      "Parse command line argument by defining a struct, derive crate.")
+    (description
+      "Parse command line argument by defining a struct, derive crate.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-syn
+  (package
+    (name "rust-syn")
+    (version "0.15.42")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "syn" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0png5pz7jjjj39xy8w7qr65y3s9qam0jpz6nbmal06m5dhq0kp7a"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-unicode-xid" ,rust-unicode-xid))
+        #:cargo-development-inputs
+        (("rust-insta" ,rust-insta)
+         ("rust-rayon" ,rust-rayon)
+         ("rust-ref-cast" ,rust-ref-cast)
+         ("rust-regex" ,rust-regex)
+         ("rust-termcolor" ,rust-termcolor)
+         ("rust-walkdir" ,rust-walkdir))))
+    (home-page "https://github.com/dtolnay/syn")
+    (synopsis "Parser for Rust source code")
+    (description "Parser for Rust source code")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-synstructure
+  (package
+    (name "rust-synstructure")
+    (version "0.11.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "synstructure" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1spqy31qcss57mciklc4nky4v778fvqs9qwdjgvnmf0hr5ichcca"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn)
+         ("rust-unicode-xid" ,rust-unicode-xid))
+        #:cargo-development-inputs
+        (("rust-synstructure-test-traits"
+          ,rust-synstructure-test-traits))))
+    (home-page
+      "https://github.com/mystor/synstructure")
+    (synopsis
+      "Helper methods and macros for custom derives")
+    (description
+      "Helper methods and macros for custom derives")
+    (license license:expat)))
+
+(define-public rust-synstructure-test-traits ; guix upstreamable
+  (package
+    (name "rust-synstructure-test-traits")
+    (version "0.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "synstructure_test_traits" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1b3fs2b9kc1gy9dilaxqjbdl4z0mlrbbxjzkprdx953rif1c3q66"))))
+    (build-system cargo-build-system)
+    (home-page "https://crates.io/crates/synstructure_test_traits")
+    (synopsis "Helper test traits for synstructure doctests")
+    (description
+     "This package provides helper test traits for synstructure doctests.")
+    (license license:expat)))
+
+(define-public rust-tempdir
+  (package
+    (name "rust-tempdir")
+    (version "0.3.7")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tempdir" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1n5n86zxpgd85y0mswrp5cfdisizq2rv3la906g6ipyc03xvbwhm"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-rand" ,rust-rand-0.4)
+         ("rust-remove-dir-all" ,rust-remove-dir-all))))
+    (home-page
+      "https://github.com/rust-lang/tempdir")
+    (synopsis
+      "A library for managing a temporary directory and deleting all contents when it's dropped.")
+    (description
+      "This package provides a library for managing a temporary directory and deleting all contents when it's dropped.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-tempfile
+  (package
+    (name "rust-tempfile")
+    (version "3.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tempfile" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1a9cfdqw70n7bcnkx05aih9xdba8lqazmqlkjpkmn2la6gcj8vks"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-cfg-if" ,rust-cfg-if)
+         ("rust-libc" ,rust-libc)
+         ("rust-rand" ,rust-rand)
+         ("rust-redox-syscall" ,rust-redox-syscall)
+         ("rust-remove-dir-all" ,rust-remove-dir-all)
+         ("rust-winapi" ,rust-winapi))))
+    (home-page
+      "http://stebalien.com/projects/tempfile-rs")
+    (synopsis
+      "A library for managing temporary files and directories.")
+    (description
+      "This package provides a library for managing temporary files and directories.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-term
+  (package
+    (name "rust-term")
+    (version "0.5.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "term" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0hkgjrfisj6zjwz525639pmsvzhlc48a0h65nw87qrdp6jihdlgd"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-byteorder" ,rust-byteorder)
+         ("rust-dirs" ,rust-dirs)
+         ("rust-winapi" ,rust-winapi))))
+    (home-page "https://github.com/Stebalien/term")
+    (synopsis "A terminal formatting library")
+    (description
+      "This package provides a terminal formatting library")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-term-size
+  (package
+    (name "rust-term-size")
+    (version "1.0.0-beta1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "term_size" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "13w9cqjhzh3mmx6zami8lxyf42xx53yy866zxhxqcm71k637v8d8"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-clippy" ,rust-clippy)
+         ;("rust-kernel32-sys" ,rust-kernel32-sys) ; windows
+         ("rust-libc" ,rust-libc)
+         ("rust-winapi" ,rust-winapi))))
+    (home-page
+      "https://github.com/kbknapp/term_size-rs.git")
+    (synopsis
+      "functions for determining terminal sizes and dimensions")
+    (description
+      "functions for determining terminal sizes and dimensions")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-termcolor
+  (package
+    (name "rust-termcolor")
+    (version "1.0.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "termcolor" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0vjfsn1a8zvqhnrbygrz1id6yckwv1dncw3w4zj65qdx0f00kmln"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-wincolor" ,rust-wincolor))))
+    (home-page "https://github.com/BurntSushi/termcolor")
+    (synopsis "Library for writing colored text to a terminal")
+    (description "This package provides a simple cross platform library for
+writing colored text to a terminal.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-termios
+  (package
+    (name "rust-termios")
+    (version "0.3.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "termios" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "09any1p4jp4bphvb5ikagnvwjc3xn2djchy96nkpa782xb2j1dkj"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs (("rust-libc" ,rust-libc))))
+    (home-page
+      "https://github.com/dcuddeback/termios-rs")
+    (synopsis
+      "Safe bindings for the termios library.")
+    (description
+      "Safe bindings for the termios library.")
+    (license license:expat)))
+
+(define-public rust-textwrap
+  (package
+    (name "rust-textwrap")
+    (version "0.11.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "textwrap" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0q5hky03ik3y50s9sz25r438bc4nwhqc6dqwynv4wylc807n29nk"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-hyphenation" ,rust-hyphenation)
+         ("rust-term-size" ,rust-term-size)
+         ("rust-unicode-width" ,rust-unicode-width))
+        #:cargo-development-inputs
+        (("rust-lipsum" ,rust-lipsum)
+         ("rust-rand" ,rust-rand)
+         ("rust-rand-xorshift" ,rust-rand-xorshift)
+         ("rust-version-sync" ,rust-version-sync))))
+    (home-page
+      "https://github.com/mgeisler/textwrap")
+    (synopsis
+      "Textwrap is a small library for word wrapping, indenting, and
+      dedenting strings.
+
+      You can use it to format strings (such as help and error messages) for
+      display in commandline applications. It is designed to be efficient
+      and handle Unicode characters correctly.")
+    (description
+      "Textwrap is a small library for word wrapping, indenting, and
+      dedenting strings.
+
+      You can use it to format strings (such as help and error messages) for
+      display in commandline applications.  It is designed to be efficient
+      and handle Unicode characters correctly.")
+    (license license:expat)))
+
+(define-public rust-thread-local
+  (package
+    (name "rust-thread-local")
+    (version "0.3.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "thread_local" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "06rzik99p8c5js8238yhc8rk6np543ylb1dy9nrw5v80j0r3xdf6"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-lazy-static" ,rust-lazy-static))))
+    (home-page
+      "https://github.com/Amanieu/thread_local-rs")
+    (synopsis "Per-object thread-local storage")
+    (description "Per-object thread-local storage")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-time
+  (package
+    (name "rust-time")
+    (version "0.1.42")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "time" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0vsbvsz0ryxb35dy9j4anxvy8zlaplmjmi0a4z4l64bc135cz3fv"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-libc" ,rust-libc)
+         ("rust-redox-syscall" ,rust-redox-syscall)
+         ("rust-rustc-serialize" ,rust-rustc-serialize)
+         ("rust-winapi" ,rust-winapi))
+        #:cargo-development-inputs
+        (("rust-log" ,rust-log)
+         ("rust-winapi" ,rust-winapi))))
+    (home-page "https://github.com/rust-lang/time")
+    (synopsis
+      "Utilities for working with time-related functions in Rust.")
+    (description
+      "Utilities for working with time-related functions in Rust.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-tokio
+  (package
+    (name "rust-tokio")
+    (version "0.1.22")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1xhaadfmm6m37f79xv5020gc3np9wqza3bq95ymp522qpfsw02as"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bytes" ,rust-bytes)
+         ("rust-futures" ,rust-futures)
+         ("rust-mio" ,rust-mio)
+         ("rust-num-cpus" ,rust-num-cpus)
+         ("rust-tokio-codec" ,rust-tokio-codec)
+         ("rust-tokio-current-thread"
+          ,rust-tokio-current-thread)
+         ("rust-tokio-executor" ,rust-tokio-executor)
+         ("rust-tokio-fs" ,rust-tokio-fs)
+         ("rust-tokio-io" ,rust-tokio-io)
+         ("rust-tokio-reactor" ,rust-tokio-reactor)
+         ("rust-tokio-sync" ,rust-tokio-sync)
+         ("rust-tokio-tcp" ,rust-tokio-tcp)
+         ("rust-tokio-threadpool" ,rust-tokio-threadpool)
+         ("rust-tokio-timer" ,rust-tokio-timer)
+         ("rust-tokio-udp" ,rust-tokio-udp)
+         ("rust-tokio-uds" ,rust-tokio-uds)
+         ("rust-tracing-core" ,rust-tracing-core))
+        #:cargo-development-inputs
+        (("rust-env-logger" ,rust-env-logger)
+         ("rust-flate2" ,rust-flate2)
+         ("rust-futures-cpupool" ,rust-futures-cpupool)
+         ("rust-http" ,rust-http)
+         ("rust-httparse" ,rust-httparse)
+         ("rust-libc" ,rust-libc)
+         ("rust-num-cpus" ,rust-num-cpus)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-derive" ,rust-serde-derive)
+         ("rust-serde-json" ,rust-serde-json)
+         ("rust-time" ,rust-time))))
+    (home-page "https://tokio.rs")
+    (synopsis
+      "An event-driven, non-blocking I/O platform for writing asynchronous I/O backed applications.")
+    (description
+      "An event-driven, non-blocking I/O platform for writing asynchronous I/O backed applications.")
+    (license license:expat)))
+
+(define-public rust-tokio-codec
+  (package
+    (name "rust-tokio-codec")
+    (version "0.1.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio-codec" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "17y3hi3dd0bdfkrzshx9qhwcf49xv9iynszj7iwy3w4nmz71wl2w"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bytes" ,rust-bytes)
+         ("rust-futures" ,rust-futures)
+         ("rust-tokio-io" ,rust-tokio-io))))
+    (home-page "https://tokio.rs")
+    (synopsis
+      "Utilities for encoding and decoding frames.")
+    (description
+      "Utilities for encoding and decoding frames.")
+    (license license:expat)))
+
+(define-public rust-tokio-current-thread
+  (package
+    (name "rust-tokio-current-thread")
+    (version "0.1.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio-current-thread" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0hx4c8v88kk0ih8x5s564gsgwwf8n11kryvxm72l1f7isz51fqni"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-futures" ,rust-futures)
+         ("rust-tokio-executor" ,rust-tokio-executor))))
+    (home-page "https://github.com/tokio-rs/tokio")
+    (synopsis
+      "Single threaded executor which manage many tasks concurrently on the current thread.")
+    (description
+      "Single threaded executor which manage many tasks concurrently on the current thread.")
+    (license license:expat)))
+
+(define-public rust-tokio-executor
+  (package
+    (name "rust-tokio-executor")
+    (version "0.1.8")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio-executor" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1b5n6barppmhfyb1m2cvswp7nqvyrr3lb0kk545my75hdl7fw9qg"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-crossbeam-utils" ,rust-crossbeam-utils)
+         ("rust-futures" ,rust-futures))
+        #:cargo-development-inputs
+        (("rust-tokio" ,rust-tokio))))
+    (home-page "https://github.com/tokio-rs/tokio")
+    (synopsis "Future execution primitives")
+    (description "Future execution primitives")
+    (license license:expat)))
+
+(define-public rust-tokio-fs
+  (package
+    (name "rust-tokio-fs")
+    (version "0.1.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio-fs" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1bxp8585pi4j5g39ci2gkk99qnyilyhhila7cs8r6scdn0idrriz"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-futures" ,rust-futures)
+         ("rust-tokio-io" ,rust-tokio-io)
+         ("rust-tokio-threadpool" ,rust-tokio-threadpool))
+        #:cargo-development-inputs
+        (("rust-rand" ,rust-rand)
+         ("rust-tempdir" ,rust-tempdir)
+         ("rust-tempfile" ,rust-tempfile)
+         ("rust-tokio" ,rust-tokio)
+         ("rust-tokio-codec" ,rust-tokio-codec)
+         ("rust-tokio-io" ,rust-tokio-io))))
+    (home-page "https://tokio.rs")
+    (synopsis "Filesystem API for Tokio.")
+    (description "Filesystem API for Tokio.")
+    (license license:expat)))
+
+(define-public rust-tokio-io
+  (package
+    (name "rust-tokio-io")
+    (version "0.1.12")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio-io" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "09jrz1hh4h1vj45qy09y7m7m8jsy1hl6g32clnky25mdim3dp42h"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bytes" ,rust-bytes)
+         ("rust-futures" ,rust-futures)
+         ("rust-log" ,rust-log))
+        #:cargo-development-inputs
+        (("rust-tokio-current-thread"
+          ,rust-tokio-current-thread))))
+    (home-page "https://tokio.rs")
+    (synopsis
+      "Core I/O primitives for asynchronous I/O in Rust.")
+    (description
+      "Core I/O primitives for asynchronous I/O in Rust.")
+    (license license:expat)))
+
+(define-public rust-tokio-reactor
+  (package
+    (name "rust-tokio-reactor")
+    (version "0.1.9")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio-reactor" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1khip64cn63xvayq1db68kxcnhgw3cb449a4n2lbw4p1qzx6pwba"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-crossbeam-utils" ,rust-crossbeam-utils)
+         ("rust-futures" ,rust-futures)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-log" ,rust-log)
+         ("rust-mio" ,rust-mio)
+         ("rust-num-cpus" ,rust-num-cpus)
+         ("rust-parking-lot" ,rust-parking-lot)
+         ("rust-slab" ,rust-slab)
+         ("rust-tokio-executor" ,rust-tokio-executor)
+         ("rust-tokio-io" ,rust-tokio-io)
+         ("rust-tokio-sync" ,rust-tokio-sync))
+        #:cargo-development-inputs
+        (("rust-num-cpus" ,rust-num-cpus)
+         ("rust-tokio" ,rust-tokio)
+         ("rust-tokio-io-pool" ,rust-tokio-io-pool))))
+    (home-page "https://tokio.rs")
+    (synopsis
+      "Event loop that drives Tokio I/O resources.")
+    (description
+      "Event loop that drives Tokio I/O resources.")
+    (license license:expat)))
+
+(define-public rust-tokio-mock-task
+  (package
+    (name "rust-tokio-mock-task")
+    (version "0.1.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio-mock-task" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1y7q83qfk9ljjfvs82b453pmz9x1v3d6kr4x55j8mal01s6790dw"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs (("rust-futures" ,rust-futures))))
+    (home-page
+      "https://github.com/carllerche/tokio-mock-task")
+    (synopsis "Mock a Tokio task")
+    (description "Mock a Tokio task")
+    (license license:expat)))
+
+(define-public rust-tokio-sync
+  (package
+    (name "rust-tokio-sync")
+    (version "0.1.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio-sync" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1ryalh7dcmnz46xj1va8aaw3if6vd4mj87r67dqvrqhpyf7j8qi1"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-fnv" ,rust-fnv)
+         ("rust-futures" ,rust-futures))
+        #:cargo-development-inputs
+        (("rust-env-logger" ,rust-env-logger)
+         ("rust-loom" ,rust-loom)
+         ("rust-tokio" ,rust-tokio)
+         ("rust-tokio-mock-task" ,rust-tokio-mock-task))))
+    (home-page "https://tokio.rs")
+    (synopsis "Synchronization utilities.")
+    (description "Synchronization utilities.")
+    (license license:expat)))
+
+(define-public rust-tokio-tcp
+  (package
+    (name "rust-tokio-tcp")
+    (version "0.1.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio-tcp" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "06a15vg8bcd33ng3h9ldzlq7wl4jsw0p9qpy7v22ls5yah3b250x"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bytes" ,rust-bytes)
+         ("rust-futures" ,rust-futures)
+         ("rust-iovec" ,rust-iovec)
+         ("rust-mio" ,rust-mio)
+         ("rust-tokio-io" ,rust-tokio-io)
+         ("rust-tokio-reactor" ,rust-tokio-reactor))
+        #:cargo-development-inputs
+        (("rust-env-logger" ,rust-env-logger)
+         ("rust-tokio" ,rust-tokio))))
+    (home-page "https://tokio.rs")
+    (synopsis "TCP bindings for tokio.")
+    (description "TCP bindings for tokio.")
+    (license license:expat)))
+
+(define-public rust-tokio-threadpool
+  (package
+    (name "rust-tokio-threadpool")
+    (version "0.1.15")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio-threadpool" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "06av6vdkgb48v6xaaci5agfydg9fsj9c338y01m3f7paklqh3jlh"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-crossbeam-deque" ,rust-crossbeam-deque)
+         ("rust-crossbeam-queue" ,rust-crossbeam-queue)
+         ("rust-crossbeam-utils" ,rust-crossbeam-utils)
+         ("rust-futures" ,rust-futures)
+         ("rust-log" ,rust-log)
+         ("rust-num-cpus" ,rust-num-cpus)
+         ("rust-rand" ,rust-rand)
+         ("rust-slab" ,rust-slab)
+         ("rust-tokio-executor" ,rust-tokio-executor))
+        #:cargo-development-inputs
+        (("rust-env-logger" ,rust-env-logger)
+         ("rust-futures-cpupool" ,rust-futures-cpupool)
+         ("rust-threadpool" ,rust-threadpool))))
+    (home-page "https://github.com/tokio-rs/tokio")
+    (synopsis
+      "A task scheduler backed by a work-stealing thread pool.")
+    (description
+      "This package provides a task scheduler backed by a work-stealing thread pool.")
+    (license license:expat)))
+
+(define-public rust-tokio-timer
+  (package
+    (name "rust-tokio-timer")
+    (version "0.2.11")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio-timer" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "03m68ainkdy3b5pf20rjyknhk2ppx35bjdc2yfj2bv80sl96h47j"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-crossbeam-utils" ,rust-crossbeam-utils)
+         ("rust-futures" ,rust-futures)
+         ("rust-slab" ,rust-slab)
+         ("rust-tokio-executor" ,rust-tokio-executor))
+        #:cargo-development-inputs
+        (("rust-rand" ,rust-rand)
+         ("rust-tokio" ,rust-tokio)
+         ("rust-tokio-mock-task" ,rust-tokio-mock-task))))
+    (home-page "https://github.com/tokio-rs/tokio")
+    (synopsis "Timer facilities for Tokio")
+    (description "Timer facilities for Tokio")
+    (license license:expat)))
+
+(define-public rust-tokio-udp
+  (package
+    (name "rust-tokio-udp")
+    (version "0.1.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio-udp" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "14kfj35s465czcspayacnzlxrazfvxzhhggq1rqlljhgp1sqa9k6"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bytes" ,rust-bytes)
+         ("rust-futures" ,rust-futures)
+         ("rust-log" ,rust-log)
+         ("rust-mio" ,rust-mio)
+         ("rust-tokio-codec" ,rust-tokio-codec)
+         ("rust-tokio-io" ,rust-tokio-io)
+         ("rust-tokio-reactor" ,rust-tokio-reactor))
+        #:cargo-development-inputs
+        (("rust-env-logger" ,rust-env-logger))))
+    (home-page "https://tokio.rs")
+    (synopsis "UDP bindings for tokio.")
+    (description "UDP bindings for tokio.")
+    (license license:expat)))
+
+(define-public rust-tokio-uds
+  (package
+    (name "rust-tokio-uds")
+    (version "0.2.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tokio-uds" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0i94kxma6l7iy5hd5k7nvn7v9pnyw0s54bm9mjs0lap1l0xzqzq3"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bytes" ,rust-bytes)
+         ("rust-futures" ,rust-futures)
+         ("rust-iovec" ,rust-iovec)
+         ("rust-libc" ,rust-libc)
+         ("rust-log" ,rust-log)
+         ("rust-mio" ,rust-mio)
+         ("rust-mio-uds" ,rust-mio-uds)
+         ("rust-tokio-codec" ,rust-tokio-codec)
+         ("rust-tokio-io" ,rust-tokio-io)
+         ("rust-tokio-reactor" ,rust-tokio-reactor))
+        #:cargo-development-inputs
+        (("rust-tempfile" ,rust-tempfile)
+         ("rust-tokio" ,rust-tokio))))
+    (home-page "https://github.com/tokio-rs/tokio")
+    (synopsis "Unix Domain sockets for Tokio")
+    (description "Unix Domain sockets for Tokio")
+    (license license:expat)))
+
+(define-public rust-toml
+  (package
+    (name "rust-toml")
+    (version "0.5.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "toml" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0fdhfyv20qn29cxq1f9j9wav92c3qhxdm71sxfyzhzpsfdw6vjdq"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-linked-hash-map" ,rust-linked-hash-map)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-serde-derive" ,rust-serde-derive)
+         ("rust-serde-json" ,rust-serde-json))))
+    (home-page
+      "https://github.com/alexcrichton/toml-rs")
+    (synopsis
+      "A native Rust encoder and decoder of TOML-formatted files and streams. Provides implementations of the standard Serialize/Deserialize traits for TOML data to facilitate deserializing and serializing Rust structures.")
+    (description
+      "A native Rust encoder and decoder of TOML-formatted files and streams. Provides implementations of the standard Serialize/Deserialize traits for TOML data to facilitate deserializing and serializing Rust structures.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-tracing-core
+  (package
+    (name "rust-tracing-core")
+    (version "0.1.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "tracing-core" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "01fa73wzw2m5ybi3kkd52dgrw97mgc3i6inmhwys46ab28giwnxi"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-lazy-static" ,rust-lazy-static))))
+    (home-page "https://tokio.rs")
+    (synopsis
+      "Core primitives for application-level tracing.")
+    (description
+      "Core primitives for application-level tracing.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-trybuild
+  (package
+    (name "rust-trybuild")
+    (version "1.0.9")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "trybuild" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0df6ipayif05xn61iavdb0dcshm9y6wmcd140pp7dl91mirygs7j"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-glob" ,rust-glob)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-serde" ,rust-serde)
+         ("rust-serde-json" ,rust-serde-json)
+         ("rust-termcolor" ,rust-termcolor)
+         ("rust-toml" ,rust-toml))))
+    (home-page "https://github.com/dtolnay/trybuild")
+    (synopsis
+      "Test harness for ui tests of compiler diagnostics")
+    (description
+      "Test harness for ui tests of compiler diagnostics")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-typenum ; guix upstreamable
+  (package
+    (name "rust-typenum")
+    (version "1.10.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "typenum" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0sc1jirllfhdi52z1xv9yqzxzpk6v7vadd13n7wvs1wnjipn6bb1"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/paholg/typenum")
+    (synopsis "Rust library for type-level numbers evaluated at compile time")
+    (description "Typenum is a Rust library for type-level numbers evaluated at
+compile time.  It currently supports bits, unsigned integers, and signed
+integers.  It also provides a type-level array of type-level numbers, but its
+implementation is incomplete.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-ucd-trie
+  (package
+    (name "rust-ucd-trie")
+    (version "0.1.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "ucd-trie" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1hh6kyzh5xygwy96wfmsf8v8czlzhps2lgbcyhj1xzy1w1xys04g"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-lazy-static" ,rust-lazy-static))))
+    (home-page
+      "https://github.com/BurntSushi/ucd-generate")
+    (synopsis
+      "A trie for storing Unicode codepoint sets and maps.")
+    (description
+      "This package provides a trie for storing Unicode codepoint sets and maps.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-ucd-util ; guix upstreamable
+  (package
+    (name "rust-ucd-util")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "ucd-util" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0x088q5z0m09a2jqcfgsnq955y8syn1mgn35cl78qinkxm4kp6zs"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/BurntSushi/ucd-generate")
+    (synopsis "library for working with the Unicode character database")
+    (description "This package provides a small utility library for working
+with the Unicode character database.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-unicode-normalization
+  (package
+    (name "rust-unicode-normalization")
+    (version "0.1.8")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "unicode-normalization" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "09i49va90rvia1agvgni4gicnqv50y5zy1naw8mr8bcqifh3j4ql"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-smallvec" ,rust-smallvec))))
+    (home-page
+      "https://github.com/unicode-rs/unicode-normalization")
+    (synopsis
+      "This crate provides functions for normalization of Unicode strings, including Canonical and Compatible Decomposition and Recomposition, as described in Unicode Standard Annex #15.")
+    (description
+      "This crate provides functions for normalization of Unicode strings, including Canonical and Compatible Decomposition and Recomposition, as described in Unicode Standard Annex #15.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-unicode-segmentation
+  (package
+    (name "rust-unicode-segmentation")
+    (version "1.3.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "unicode-segmentation" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1a9jqg7rb1yq6w2xc9jgxcs111yk5vxm9afjfvykfnrmzk6z8rqr"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-quickcheck" ,rust-quickcheck))))
+    (home-page
+      "https://github.com/unicode-rs/unicode-segmentation")
+    (synopsis
+      "This crate provides Grapheme Cluster, Word and Sentence boundaries
+      according to Unicode Standard Annex #29 rules.")
+    (description
+      "This crate provides Grapheme Cluster, Word and Sentence boundaries
+      according to Unicode Standard Annex #29 rules.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-unicode-width ; guix upstreamable
+  (package
+    (name "rust-unicode-width")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "unicode-width" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "09k5lipygardwy0660jhls08fsgknrazzivmn804gps53hiqc8w8"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/unicode-rs/unicode-width")
+    (synopsis "Determine displayed width according to Unicode rules")
+    (description "This crate allows you to determine displayed width of
+@code{char} and @code{str} types according to Unicode Standard Annex #11 rules.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-unindent ; guix upstreamable
+  (package
+    (name "rust-unindent")
+    (version "0.1.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "unindent" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1x21ilf78aqcq9xzb9b7i628wm10rhk0jp0chlv06rkc690l8jw3"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/dtolnay/indoc")
+    (synopsis "Remove a column of leading whitespace from a string")
+    (description "This crate allows you to remove a column of leading
+whitespace from a string.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-url
+  (package
+    (name "rust-url")
+    (version "2.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "url" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1ij81gib9z2n9r67gin545zr7xvh345pr5bydg2q2sswwr9azpbp"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-idna" ,rust-idna)
+         ("rust-matches" ,rust-matches)
+         ("rust-percent-encoding" ,rust-percent-encoding)
+         ("rust-serde" ,rust-serde))
+        #:cargo-development-inputs
+        (("rust-bencher" ,rust-bencher)
+         ("rust-rustc-test" ,rust-rustc-test)
+         ("rust-serde-json" ,rust-serde-json))))
+    (home-page "https://github.com/servo/rust-url")
+    (synopsis
+      "URL library for Rust, based on the WHATWG URL Standard")
+    (description
+      "URL library for Rust, based on the WHATWG URL Standard")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-utf8-ranges
+  (package
+    (name "rust-utf8-ranges")
+    (version "1.0.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "utf8-ranges" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1ppzjsxmv1p1xfid8wwn07ciikk84k30frl28bwsny6za1vall4x"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-doc-comment" ,rust-doc-comment)
+         ("rust-quickcheck" ,rust-quickcheck))))
+    (home-page
+      "https://github.com/BurntSushi/utf8-ranges")
+    (synopsis
+      "Convert ranges of Unicode codepoints to UTF-8 byte ranges.")
+    (description
+      "Convert ranges of Unicode codepoints to UTF-8 byte ranges.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-uuid
+  (package
+    (name "rust-uuid")
+    (version "0.7.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "uuid" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0ank4xk20x3nrz926w8j9mz53bi3v8bykxmhlq2pffa8xc8wdnwh"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-byteorder" ,rust-byteorder)
+         ("rust-md5" ,rust-md5)
+         ("rust-rand" ,rust-rand-0.6)
+         ("rust-serde" ,rust-serde)
+         ("rust-sha1" ,rust-sha1)
+         ("rust-slog" ,rust-slog)
+         ("rust-winapi" ,rust-winapi))
+        #:cargo-development-inputs
+        (("rust-bincode" ,rust-bincode)
+         ("rust-serde-derive" ,rust-serde-derive)
+         ("rust-serde-json" ,rust-serde-json)
+         ("rust-serde-test" ,rust-serde-test))))
+    (home-page "https://github.com/uuid-rs/uuid")
+    (synopsis
+      "A library to generate and parse UUIDs.")
+    (description
+      "This package provides a library to generate and parse UUIDs.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-vcpkg
+  (package
+    (name "rust-vcpkg")
+    (version "0.2.7")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "vcpkg" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "15dzk1b96q946v9aisbd1bbhi33n93wvgziwh1shmscn1xflbp9k"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-lazy-static" ,rust-lazy-static)
+         ("rust-tempdir" ,rust-tempdir))))
+    (home-page "https://github.com/mcgoo/vcpkg-rs")
+    (synopsis
+      "A library to find native dependencies in a vcpkg tree at build time in order to be used in Cargo build scripts.")
+    (description
+      "A library to find native dependencies in a vcpkg tree at build time in order to be used in Cargo build scripts.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-vec-map
+  (package
+    (name "rust-vec-map")
+    (version "0.8.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "vec_map" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "06n8hw4hlbcz328a3gbpvmy0ma46vg1lc0r5wf55900szf3qdiq5"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs (("rust-serde" ,rust-serde))))
+    (home-page
+      "https://github.com/contain-rs/vec-map")
+    (synopsis
+      "A simple map based on a vector for small integer keys")
+    (description
+      "This package provides a simple map based on a vector for small integer keys")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-version-sync
+  (package
+    (name "rust-version-sync")
+    (version "0.8.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "version-sync" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "01pq0ia7ak7d69c3chjgdmaaq271yrspgbzmk6wmrwb74hx3skw4"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-itertools" ,rust-itertools)
+         ("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-pulldown-cmark" ,rust-pulldown-cmark)
+         ("rust-regex" ,rust-regex)
+         ("rust-semver-parser" ,rust-semver-parser)
+         ("rust-syn" ,rust-syn)
+         ("rust-toml" ,rust-toml)
+         ("rust-url" ,rust-url))))
+    (home-page
+      "https://github.com/mgeisler/version-sync")
+    (synopsis
+      "Simple crate for ensuring that version numbers in README files are
+      updated when the crate version changes.")
+    (description
+      "Simple crate for ensuring that version numbers in README files are
+      updated when the crate version changes.")
+    (license license:expat)))
+
+(define-public rust-walkdir
+  (package
+    (name "rust-walkdir")
+    (version "2.2.9")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "walkdir" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "07ppalpvxkf8cnqr64np422792y4z5bs9m8b4nrflh5rm17wjn4n"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-same-file" ,rust-same-file)
+         ("rust-winapi" ,rust-winapi)
+         ("rust-winapi-util" ,rust-winapi-util))
+        #:cargo-development-inputs
+        (("rust-doc-comment" ,rust-doc-comment))))
+    (home-page
+      "https://github.com/BurntSushi/walkdir")
+    (synopsis "Recursively walk a directory.")
+    (description "Recursively walk a directory.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-wasm-bindgen
+  (package
+    (name "rust-wasm-bindgen")
+    (version "0.2.48")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "wasm-bindgen" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0m8vq3jkhz04fn3wjvb7ii7xql60w32nlvr10jcskcbbh2hpzsad"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-serde" ,rust-serde)
+         ("rust-serde-json" ,rust-serde-json)
+         ("rust-wasm-bindgen-macro"
+          ,rust-wasm-bindgen-macro))))
+    (home-page "https://rustwasm.github.io/")
+    (synopsis
+      "Easy support for interacting between JS and Rust.")
+    (description
+      "Easy support for interacting between JS and Rust.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-wasm-bindgen-backend
+  (package
+    (name "rust-wasm-bindgen-backend")
+    (version "0.2.48")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "wasm-bindgen-backend" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1qxqkbjkjg4pphhcr91nk95c0gizx77dyq24mmijqnwzxxqc30jx"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-bumpalo" ,rust-bumpalo)
+         ("rust-lazy-static" ,rust-lazy-static)
+         ("rust-log" ,rust-log)
+         ("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn)
+         ("rust-wasm-bindgen-shared"
+          ,rust-wasm-bindgen-shared))))
+    (home-page
+      "https://rustwasm.github.io/wasm-bindgen/")
+    (synopsis
+      "Backend code generation of the wasm-bindgen tool")
+    (description
+      "Backend code generation of the wasm-bindgen tool")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-wasm-bindgen-macro
+  (package
+    (name "rust-wasm-bindgen-macro")
+    (version "0.2.48")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "wasm-bindgen-macro" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "07fqzzlbncccmnxbbkg9v4n53qc1lps5g0bb9wq3i9zp9gvm0zgh"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-quote" ,rust-quote)
+         ("rust-wasm-bindgen-macro-support"
+          ,rust-wasm-bindgen-macro-support))
+        #:cargo-development-inputs
+        (("rust-trybuild" ,rust-trybuild)
+         ("rust-wasm-bindgen" ,rust-wasm-bindgen))))
+    (home-page
+      "https://rustwasm.github.io/wasm-bindgen/")
+    (synopsis
+      "Definition of the `#[wasm_bindgen]` attribute, an internal dependency")
+    (description
+      "Definition of the `#[wasm_bindgen]` attribute, an internal dependency")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-wasm-bindgen-macro-support
+  (package
+    (name "rust-wasm-bindgen-macro-support")
+    (version "0.2.48")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "wasm-bindgen-macro-support" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1mxi6rj11k67sks88pfqiqylnijxmb1s0gcgpj8mzfj5gvkqzkwm"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote)
+         ("rust-syn" ,rust-syn)
+         ("rust-wasm-bindgen-backend"
+          ,rust-wasm-bindgen-backend)
+         ("rust-wasm-bindgen-shared"
+          ,rust-wasm-bindgen-shared))))
+    (home-page
+      "https://rustwasm.github.io/wasm-bindgen/")
+    (synopsis
+      "The part of the implementation of the `#[wasm_bindgen]` attribute that is not in the shared backend crate")
+    (description
+      "The part of the implementation of the `#[wasm_bindgen]` attribute that is not in the shared backend crate")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-wasm-bindgen-shared ; guix upstreamable
+  (package
+    (name "rust-wasm-bindgen-shared")
+    (version "0.2.48")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "wasm-bindgen-shared" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "08rnfhjyk0f6liv8n4rdsvhx7r02glkhcbj2lp9lcbkbfpad9hnr"))))
+    (build-system cargo-build-system)
+    (home-page "https://rustwasm.github.io/wasm-bindgen/")
+    (synopsis "Shared support between wasm-bindgen and wasm-bindgen cli")
+    (description "This package provides shared support between
+@code{wasm-bindgen} and @code{wasm-bindgen} cli, an internal dependency.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-wasm-bindgen-test
+  (package
+    (name "rust-wasm-bindgen-test")
+    (version "0.2.48")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "wasm-bindgen-test" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0gwslc2sfkghzzb3r0gvd8i5rig2nlqgpl1rn43y2w4mr1ci494k"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-console-error-panic-hook"
+          ,rust-console-error-panic-hook)
+         ("rust-futures" ,rust-futures)
+         ("rust-js-sys" ,rust-js-sys)
+         ("rust-scoped-tls" ,rust-scoped-tls)
+         ("rust-wasm-bindgen" ,rust-wasm-bindgen)
+         ("rust-wasm-bindgen-futures"
+          ,rust-wasm-bindgen-futures)
+         ("rust-wasm-bindgen-test-macro"
+          ,rust-wasm-bindgen-test-macro))))
+    (home-page
+      "https://github.com/rustwasm/wasm-bindgen")
+    (synopsis
+      "Internal testing crate for wasm-bindgen")
+    (description
+      "Internal testing crate for wasm-bindgen")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-wasm-bindgen-test-macro
+  (package
+    (name "rust-wasm-bindgen-test-macro")
+    (version "0.2.48")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "wasm-bindgen-test-macro" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0n28mr6vncf1k1qr2b5bvfxq4jvqkjdzq0z0ab6w2f5d6v8q3q3l"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-proc-macro2" ,rust-proc-macro2)
+         ("rust-quote" ,rust-quote))))
+    (home-page
+      "https://github.com/rustwasm/wasm-bindgen")
+    (synopsis
+      "Internal testing macro for wasm-bindgen")
+    (description
+      "Internal testing macro for wasm-bindgen")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-which
+  (package
+    (name "rust-which")
+    (version "2.0.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "which" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0r7i793sc0xqnd2fxnqbksj7j1kx65bwn81b8z49750v4c8cnymm"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-failure" ,rust-failure)
+         ("rust-libc" ,rust-libc))
+        #:cargo-development-inputs
+        (("rust-tempdir" ,rust-tempdir))))
+    (home-page
+      "https://github.com/harryfei/which-rs.git")
+    (synopsis
+      "A Rust equivalent of Unix command \"which\". Locate installed execuable in cross platforms.")
+    (description
+      "This package provides a Rust equivalent of Unix command \"which\".  Locate installed execuable in cross platforms.")
+    (license license:expat)))
+
+(define-public rust-winapi
+  (package
+    (name "rust-winapi")
+    (version "0.3.7")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "winapi" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0w7pbhcl087lkggxdflfp2i92rq89ahsfdkjkv44fgmiy9m3h3pi"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-winapi-i686-pc-windows-gnu"
+          ,rust-winapi-i686-pc-windows-gnu)
+         ("rust-winapi-x86-64-pc-windows-gnu"
+          ,rust-winapi-x86-64-pc-windows-gnu))))
+    (home-page
+      "https://github.com/retep998/winapi-rs")
+    (synopsis
+      "Raw FFI bindings for all of Windows API.")
+    (description
+      "Raw FFI bindings for all of Windows API.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-winapi-i686-pc-windows-gnu ; guix upstreamable?
+  (package
+    (name "rust-winapi-i686-pc-windows-gnu")
+    (version "0.4.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "winapi-i686-pc-windows-gnu" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1dmpa6mvcvzz16zg6d5vrfy4bxgg541wxrcip7cnshi06v38ffxc"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/retep998/winapi-rs")
+    (synopsis "Import libraries for the i686-pc-windows-gnu target")
+    (description "This crate provides import libraries for the
+i686-pc-windows-gnu target.  Please don't use this crate directly, depend on
+@code{winapi} instead.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-winapi-util
+  (package
+    (name "rust-winapi-util")
+    (version "0.1.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "winapi-util" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1j839dc6y8vszvrsb7yk0qvs0w6asnahxzbyans37vnsw6vbls3i"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs (("rust-winapi" ,rust-winapi))))
+    (home-page
+      "https://github.com/BurntSushi/winapi-util")
+    (synopsis
+      "A dumping ground for high level safe wrappers over winapi.")
+    (description
+      "This package provides a dumping ground for high level safe wrappers over winapi.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-winapi-x86-64-pc-windows-gnu ; guix upstreamable?
+  (package
+    (name "rust-winapi-x86-64-pc-windows-gnu")
+    (version "0.4.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "winapi-x86_64-pc-windows-gnu" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0gqq64czqb64kskjryj8isp62m2sgvx25yyj3kpc2myh85w24bki"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/retep998/winapi-rs")
+    (synopsis "Import libraries for the x86_64-pc-windows-gnu target")
+    (description "This package provides import libraries for the
+x86_64-pc-windows-gnu target.  Please don't use this crate directly, depend on
+@code{winapi} instead.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-wincolor
+  (package
+    (name "rust-wincolor")
+    (version "1.0.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "wincolor" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1fp9sxq63kw3vjjcjrl3f7px082pplzxcr3qza2n2pa6mq0xj7jn"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-winapi" ,rust-winapi)
+         ("rust-winapi-util" ,rust-winapi-util))))
+    (home-page
+      "https://github.com/BurntSushi/termcolor/tree/master/wincolor")
+    (synopsis
+      "A simple Windows specific API for controlling text color in a Windows console.")
+    (description
+      "This package provides a simple Windows specific API for controlling text color in a Windows console.")
+    (license (list license:unlicense
+                   license:expat))))
+
+(define-public rust-yaml-rust
+  (package
+    (name "rust-yaml-rust")
+    (version "0.4.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "yaml-rust" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0ka3qhqc5lvk3hz14wmsj32jhmh44blcbfrx5hfxli2gg38kv4k5"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-inputs
+        (("rust-linked-hash-map" ,rust-linked-hash-map))
+        #:cargo-development-inputs
+        (("rust-quickcheck" ,rust-quickcheck))))
+    (home-page
+      "http://chyh1990.github.io/yaml-rust/")
+    (synopsis "The missing YAML 1.2 parser for rust")
+    (description
+      "The missing YAML 1.2 parser for rust")
+    (license (list license:asl2.0
+                   license:expat))))