Added impop and dependencies

2 files changed, 440 insertions, 2 deletions

diff --git a/gn/packages/pangenome-rust.scm b/gn/packages/pangenome-rust.scm
index a488375..451c020 100644
--- a/gn/packages/pangenome-rust.scm
+++ b/gn/packages/pangenome-rust.scm
@@ -1754,6 +1754,16 @@
     (file-name (git-file-name "rust-ragc" "0.1.1.e9e4a6f"))
     (sha256 (base32 "0ks74pgh0vjy4mzxvp7riq1rkf9zh9kqzhvvy8iys46zrbkxmhs7"))))
 
+(define rust-ragc-0.1.1.40e5cad
+  ;; ekg's fork of ragc, used by impop's hprc-ibs.  Same workspace
+  ;; layout; copied to a path dir by the impop build phase.
+  (origin
+    (method git-fetch)
+    (uri (git-reference (url "https://github.com/ekg/ragc")
+                        (commit "40e5cad11cab7d4df07a72d6b16d68c2d60b0742")))
+    (file-name (git-file-name "rust-ragc" "0.1.1.40e5cad"))
+    (sha256 (base32 "1p71jj02ppcvkrvnbs4y0yf00cslzqhlx4idscx8fk4lhmip4kla"))))
+
 (define rust-seqwish-0.1.3.b65a7e0
   (origin
     (method git-fetch)
@@ -2607,6 +2617,107 @@
   (crate-source "rustc-hash" "2.1.2"
                 "1gjdc5bw9982cj176jvgz9rrqf9xvr1q1ddpzywf5qhs7yzhlc4l"))
 
+(define rust-assert-cmd-2.1.2
+  (crate-source "assert_cmd" "2.1.2"
+                "0505wrwzjfy2wdqhvmk0an4s69vbxfp5a45i5k8mvi4sfjlcynww"))
+
+(define rust-bstr-1.12.1
+  (crate-source "bstr" "1.12.1"
+                "1arc1v7h5l86vd6z76z3xykjzldqd5icldn7j9d3p7z6x0d4w133"))
+
+(define rust-clap-4.5.54
+  (crate-source "clap" "4.5.54"
+                "15737jmai272j6jh4ha4dq4ap14ysx2sa5wsjv6zbkvrrnfzzrn6"))
+
+(define rust-clap-builder-4.5.54
+  (crate-source "clap_builder" "4.5.54"
+                "001cnl5ccva6z3x5nw3m72zs3bzb650anz1scs7vqhbs5d6wyhps"))
+
+(define rust-clap-derive-4.5.49
+  (crate-source "clap_derive" "4.5.49"
+                "0wbngw649138v3jwx8pm5x9sq0qsml3sh0sfzyrdxcpamy3m82ra"))
+
+(define rust-clap-lex-0.7.7
+  (crate-source "clap_lex" "0.7.7"
+                "0cibsbziyzw2ywar2yh6zllsamhwkblfly565zgi56s3q064prn3"))
+
+(define rust-difflib-0.4.0
+  (crate-source "difflib" "0.4.0"
+                "1s7byq4d7jgf2hcp2lcqxi2piqwl8xqlharfbi8kf90n8csy7131"))
+
+(define rust-float-cmp-0.10.0
+  (crate-source "float-cmp" "0.10.0"
+                "1n760i3nxd2x0zc7fkxkg3vhvdyfbvzngna006cl9s9jacaz775h"))
+
+(define rust-js-sys-0.3.92
+  ;; TODO REVIEW: Check bundled sources.
+  (crate-source "js-sys" "0.3.92"
+                "15gr27bg97yzcxx13kab95xcjajlxbypfpv4x35ymrm2bbs90k6c"))
+
+(define rust-libc-0.2.180
+  (crate-source "libc" "0.2.180"
+                "1z2n7hl10fnk1xnv19ahhqxwnb4qi9aclnl6gigim2aaahw5mhxw"))
+
+(define rust-normalize-line-endings-0.3.0
+  (crate-source "normalize-line-endings" "0.3.0"
+                "1gp52dfn2glz26a352zra8h04351icf0fkqzw1shkwrgh1vpz031"))
+
+(define rust-predicates-3.1.3
+  (crate-source "predicates" "3.1.3"
+                "0wrm57acvagx0xmh5xffx5xspsr2kbggm698x0vks132fpjrxld5"))
+
+(define rust-predicates-core-1.0.9
+  (crate-source "predicates-core" "1.0.9"
+                "1yjz144yn3imq2r4mh7k9h0r8wv4yyjjj57bs0zwkscz24mlczkj"))
+
+(define rust-predicates-tree-1.0.12
+  (crate-source "predicates-tree" "1.0.12"
+                "0p223d9y02ywwxs3yl68kziswz4da4vabz67jfhp7yqx71njvpbj"))
+
+(define rust-syn-2.0.114
+  (crate-source "syn" "2.0.114"
+                "0akw62dizhyrkf3ym1jsys0gy1nphzgv0y8qkgpi6c1s4vghglfl"))
+
+(define rust-tempfile-3.24.0
+  (crate-source "tempfile" "3.24.0"
+                "171fz3h6rj676miq15fyv1hnv69p426mlp8489bwa1b3xg3sjpb5"))
+
+(define rust-termtree-0.5.1
+  (crate-source "termtree" "0.5.1"
+                "10s610ax6nb70yi7xfmwcb6d3wi9sj5isd0m63gy2pizr2zgwl4g"))
+
+(define rust-toml-0.5.11
+  (crate-source "toml" "0.5.11"
+                "0d2266nx8b3n22c7k24x4428z6di8n83a9n466jm7a2hipfz1xzl"))
+
+(define rust-unicode-ident-1.0.22
+  (crate-source "unicode-ident" "1.0.22"
+                "1x8xrz17vqi6qmkkcqr8cyf0an76ig7390j9cnqnk47zyv2gf4lk"))
+
+(define rust-wait-timeout-0.2.1
+  (crate-source "wait-timeout" "0.2.1"
+                "04azqv9mnfxgvnc8j2wp362xraybakh2dy1nj22gj51rdl93pb09"))
+
+(define rust-wasm-bindgen-0.2.115
+  (crate-source "wasm-bindgen" "0.2.115"
+                "0nj9a27y6am4qpjx7j6bmxdfsqc12fmyzic9d8wkwqxp2y8dc8v5"))
+
+(define rust-wasm-bindgen-macro-0.2.115
+  (crate-source "wasm-bindgen-macro" "0.2.115"
+                "0rrfqcnijmkimjxz79vf68a6dzjvgxrzabq57pnh3xxjirsnqfjf"))
+
+(define rust-wasm-bindgen-macro-support-0.2.115
+  (crate-source "wasm-bindgen-macro-support" "0.2.115"
+                "1pzyanqchcq5xdhx4h4wdyd9c19dal0p68xvpi96p204g5ry47cj"))
+
+(define rust-wasm-bindgen-shared-0.2.115
+  (crate-source "wasm-bindgen-shared" "0.2.115"
+                "14sa6v10fb0wnjxh0saw3nx37bnrp8vp6lh4qqs8kda2z5m98gm9"))
+
+(define rust-web-sys-0.3.92
+  ;; TODO REVIEW: Check bundled sources.
+  (crate-source "web-sys" "0.3.92"
+                "157d0p462dnnry1bmqfvbskgwks91j4vb32v32qzqz2dgx8fikc4"))
 (define-cargo-inputs lookup-cargo-inputs
   (gfainject =>
     (list rust-adler-1.0.2
@@ -3903,6 +4014,172 @@
           rust-zmij-1.0.21
           rust-zstd-0.13.3
           rust-zstd-safe-7.2.4
+          rust-zstd-sys-2.0.16+zstd.1.5.7))
+  (impop =>
+    (list rust-adler2-2.0.1
+          rust-ahash-0.8.12
+          rust-aho-corasick-1.1.4
+          rust-allocator-api2-0.2.21
+          rust-anes-0.1.6
+          rust-anstream-0.6.21
+          rust-anstream-1.0.0
+          rust-anstyle-1.0.13
+          rust-anstyle-parse-0.2.7
+          rust-anstyle-parse-1.0.0
+          rust-anstyle-query-1.1.5
+          rust-anstyle-wincon-3.0.11
+          rust-anyhow-1.0.100
+          rust-arbitrary-chunks-0.4.1
+          rust-assert-cmd-2.1.2
+          rust-autocfg-1.5.0
+          rust-bgzip-0.3.1
+          rust-bincode-1.3.3
+          rust-bitflags-2.10.0
+          rust-block-buffer-0.10.4
+          rust-block-pseudorand-0.1.2
+          rust-bstr-1.12.1
+          rust-bumpalo-3.20.2
+          rust-byteorder-1.5.0
+          rust-bytes-1.11.1
+          rust-cast-0.3.0
+          rust-cc-1.2.58
+          rust-cfg-if-1.0.4
+          rust-chiapos-chacha8-0.1.0
+          rust-ciborium-0.2.2
+          rust-ciborium-io-0.2.2
+          rust-ciborium-ll-0.2.2
+          rust-clap-4.5.54
+          rust-clap-builder-4.5.54
+          rust-clap-derive-4.5.49
+          rust-clap-lex-0.7.7
+          rust-colorchoice-1.0.4
+          rust-cpufeatures-0.2.17
+          rust-crc32fast-1.5.0
+          rust-criterion-0.5.1
+          rust-criterion-plot-0.5.0
+          rust-crossbeam-0.8.4
+          rust-crossbeam-channel-0.5.15
+          rust-crossbeam-deque-0.8.6
+          rust-crossbeam-epoch-0.9.18
+          rust-crossbeam-queue-0.3.12
+          rust-crossbeam-utils-0.8.21
+          rust-crunchy-0.2.4
+          rust-crypto-common-0.1.7
+          rust-dashmap-6.1.0
+          rust-difflib-0.4.0
+          rust-digest-0.10.7
+          rust-either-1.15.0
+          rust-env-filter-1.0.1
+          rust-env-logger-0.11.10
+          rust-errno-0.3.14
+          rust-fastrand-2.3.0
+          rust-find-msvc-tools-0.1.9
+          rust-flate2-1.1.9
+          rust-float-cmp-0.10.0
+          rust-generic-array-0.14.7
+          rust-getrandom-0.3.4
+          rust-half-2.7.1
+          rust-hashbrown-0.14.5
+          rust-heck-0.5.0
+          rust-hermit-abi-0.5.2
+          rust-is-terminal-0.4.17
+          rust-is-terminal-polyfill-1.70.2
+          rust-itertools-0.10.5
+          rust-itoa-1.0.18
+          rust-jiff-0.2.23
+          rust-jiff-static-0.2.23
+          rust-jobserver-0.1.34
+          rust-js-sys-0.3.92
+          rust-lib-wfa2-0.1.0.8859b6a
+          rust-libc-0.2.180
+          rust-linux-raw-sys-0.11.0
+          rust-lock-api-0.4.14
+          rust-log-0.4.29
+          rust-memchr-2.7.6
+          rust-miniz-oxide-0.8.9
+          rust-nanorand-0.6.1
+          rust-noodles-0.100.0
+          rust-noodles-bgzf-0.42.0
+          rust-normalize-line-endings-0.3.0
+          rust-num-cpus-1.17.0
+          rust-num-traits-0.2.19
+          rust-once-cell-1.21.3
+          rust-once-cell-polyfill-1.70.2
+          rust-oorandom-11.1.5
+          rust-parking-lot-core-0.9.12
+          rust-partition-0.1.2
+          rust-pkg-config-0.3.32
+          rust-plotters-0.3.7
+          rust-plotters-backend-0.3.7
+          rust-plotters-svg-0.3.7
+          rust-portable-atomic-1.13.1
+          rust-portable-atomic-util-0.2.6
+          rust-predicates-3.1.3
+          rust-predicates-core-1.0.9
+          rust-predicates-tree-1.0.12
+          rust-proc-macro2-1.0.106
+          rust-quote-1.0.44
+          rust-r-efi-5.3.0
+          ;; ragc is a Cargo workspace (ragc-core + ragc-common);
+          ;; the per-crate origins confuse cargo's git-checkout
+          ;; vendor mapping.  Use the workspace origin and copy it
+          ;; to a path dir at build time (see impop's
+          ;; copy-ragc-workspace phase in pangenome.scm).
+          rust-ragc-0.1.1.40e5cad
+          rust-rayon-1.11.0
+          rust-rayon-core-1.13.0
+          rust-rdst-0.20.14
+          rust-redox-syscall-0.5.18
+          rust-regex-1.12.3
+          rust-regex-automata-0.4.13
+          rust-regex-syntax-0.8.10
+          rust-rustix-1.1.3
+          rust-rustversion-1.0.22
+          rust-same-file-1.0.6
+          rust-scopeguard-1.2.0
+          rust-serde-1.0.228
+          rust-serde-core-1.0.228
+          rust-serde-derive-1.0.228
+          rust-serde-json-1.0.149
+          rust-sha2-0.10.9
+          rust-shlex-1.3.0
+          rust-simd-adler32-0.3.8
+          rust-smallvec-1.15.1
+          rust-strsim-0.11.1
+          rust-syn-2.0.114
+          rust-tempfile-3.24.0
+          rust-termtree-0.5.1
+          rust-thiserror-1.0.69
+          rust-thiserror-impl-1.0.69
+          rust-tikv-jemalloc-sys-0.5.4+5.3.0-patched
+          rust-tikv-jemallocator-0.5.4
+          rust-tinytemplate-1.2.1
+          rust-toml-0.5.11
+          rust-tpa-0.1.0.49f1801
+          rust-tracepoints-0.1.0.66a5511
+          rust-typenum-1.19.0
+          rust-unicode-ident-1.0.22
+          rust-utf8parse-0.2.2
+          rust-version-check-0.9.5
+          rust-voracious-radix-sort-1.2.0
+          rust-wait-timeout-0.2.1
+          rust-walkdir-2.5.0
+          rust-wasip2-1.0.2+wasi-0.2.9
+          rust-wasm-bindgen-0.2.115
+          rust-wasm-bindgen-macro-0.2.115
+          rust-wasm-bindgen-macro-support-0.2.115
+          rust-wasm-bindgen-shared-0.2.115
+          rust-web-sys-0.3.92
+          rust-winapi-util-0.1.11
+          rust-windows-link-0.2.1
+          rust-windows-sys-0.61.2
+          rust-wit-bindgen-0.51.0
+          rust-zerocopy-0.8.48
+          rust-zerocopy-derive-0.8.48
+          rust-zlib-rs-0.6.3
+          rust-zmij-1.0.21
+          rust-zstd-0.13.3
+          rust-zstd-safe-7.2.4
           rust-zstd-sys-2.0.16+zstd.1.5.7)))
 
 ;;;
diff --git a/gn/packages/pangenome.scm b/gn/packages/pangenome.scm
index 977751e..e309d1b 100644
--- a/gn/packages/pangenome.scm
+++ b/gn/packages/pangenome.scm
@@ -1680,6 +1680,159 @@ and supporting tools like minimap2, samtools, bedtools, bwa-mem2, meryl,
 kfilt, miniprot, pangene, wally, and vcfbub.")
     (license license:expat)))
 
+(define-public impop
+  ;; Population-genomics tools for implicit pangenomes (impop_k suite).
+  ;; The Rust workspace ships under source/ inside MarsicoFL/memimpopk
+  ;; until MarsicoFL/IMPOPk is released; see memimpopk/bin/README.md
+  ;; for the provenance note.  Builds four binaries: ibs, ibd,
+  ;; ancestry, jacquard (plus the ibd-validate auxiliary).
+  (let ((commit "d0c6ca847468153c81da64078c6a112b6569eb1c")
+        (revision "0"))
+    (package
+      (name "impop")
+      (version (git-version "0.2.0" revision commit))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/MarsicoFL/memimpopk")
+                      (commit commit)))
+                (file-name (git-file-name name version))
+                (sha256
+                 (base32
+                  "00ln6bfnqcq0skwfdmsd29bclifc116mrw81zkki02b6lmf7r652"))))
+      (build-system cargo-build-system)
+      (arguments
+       (list #:install-source? #f
+             #:tests? #f  ; integration tests need data + the workshop scripts
+             #:phases
+             #~(modify-phases %standard-phases
+                 (add-after 'unpack 'chdir-to-workspace
+                   (lambda _
+                     ;; The Cargo workspace ships in source/; everything
+                     ;; outside is workshop material.
+                     (chdir "source")))
+                 ;; configure unpacks vendored crates to guix-vendor/;
+                 ;; wit-bindgen 0.51 ships a pre-built static archive
+                 ;; that the vendor audit flags as non-reproducible.
+                 ;; Strip it; the binaries we build do not exercise the
+                 ;; wasm component-model runtime.
+                 (add-before 'build 'remove-prebuilt-wit-bindgen-archive
+                   (lambda _
+                     (let ((stale "guix-vendor/rust-wit-bindgen-0.51.0.tar.gz/src/rt/libwit_bindgen_cabi.a"))
+                       (when (file-exists? stale)
+                         (delete-file stale)))))
+                 ;; ragc (https://github.com/ekg/ragc) is a Cargo
+                 ;; workspace; copy the whole tree into ragc-workspace/
+                 ;; and point ibs-cli's ragc-core dep at it.  Same
+                 ;; pattern as impg's ragc-workspace handling.
+                 (add-before 'build 'copy-ragc-workspace
+                   (lambda* (#:key inputs #:allow-other-keys)
+                     (let ((src (assoc-ref inputs
+                                  "rust-ragc-0.1.1.40e5cad-checkout")))
+                       (copy-recursively src "ragc-workspace"))))
+                 ;; ibs-cli depends on lib_wfa2 (git rev) and
+                 ;; ragc-core (git rev, workspace).  Point both at
+                 ;; local paths so cargo can resolve offline, and
+                 ;; tell impop's outer workspace to ignore the
+                 ;; nested ragc one (otherwise cargo treats ragc-core
+                 ;; as a member of impop's workspace and
+                 ;; workspace.package inheritance picks the wrong
+                 ;; root manifest).
+                 (add-before 'build 'fix-dependency-sources
+                   (lambda _
+                     (substitute* "Cargo.toml"
+                       (("members = \\[")
+                        "exclude = [\"ragc-workspace\"]\nmembers = ["))
+                     (substitute* "src/ibs-cli/Cargo.toml"
+                       (("tpa = \\{ git = \"[^\"]*\"[^}]*\\}")
+                        "tpa = { path = \"../../guix-vendor/rust-tpa-0.1.0.49f1801-checkout\", version = \"0.1.0\" }")
+                       (("lib_wfa2 = \\{ git = \"[^\"]*\", rev = \"[^\"]*\" \\}")
+                        "lib_wfa2 = { path = \"../../guix-vendor/rust-lib-wfa2-0.1.0.8859b6a-checkout\", version = \"0.1.0\" }")
+                       (("tracepoints = \\{ git = \"[^\"]*\", rev = \"[^\"]*\" \\}")
+                        "tracepoints = { path = \"../../guix-vendor/rust-tracepoints-0.1.0.66a5511-checkout\", version = \"0.1.0\" }")
+                       (("ragc-core = \\{ git = \"[^\"]*\", rev = \"[^\"]*\" \\}")
+                        "ragc-core = { path = \"../../ragc-workspace/ragc-core\" }"))
+                     ;; tpa and tracepoints have nested git deps on
+                     ;; lib_wfa2 (same rev) and on each other.  Rewire
+                     ;; them to the same vendored checkouts.
+                     (substitute* "guix-vendor/rust-tpa-0.1.0.49f1801-checkout/Cargo.toml"
+                       (("lib_wfa2 = \\{ git = \"[^\"]*\"[^}]*\\}")
+                        "lib_wfa2 = { path = \"../rust-lib-wfa2-0.1.0.8859b6a-checkout\", version = \"0.1.0\" }")
+                       (("tracepoints = \\{ git = \"[^\"]*\"[^}]*\\}")
+                        "tracepoints = { path = \"../rust-tracepoints-0.1.0.66a5511-checkout\", version = \"0.1.0\" }")
+                       ;; Strip dev-deps; cargo --offline still wants
+                       ;; them in the vendor even though we don't run
+                       ;; tpa's tests.
+                       (("^rand = .*") "")
+                       (("\\[dev-dependencies\\]") "[fake-removed]"))
+                     (substitute* "guix-vendor/rust-tracepoints-0.1.0.66a5511-checkout/Cargo.toml"
+                       (("lib_wfa2 = \\{ git = \"[^\"]*\"[^}]*\\}")
+                        "lib_wfa2 = { path = \"../rust-lib-wfa2-0.1.0.8859b6a-checkout\", version = \"0.1.0\" }"))))
+                 ;; cargo-build-system's default install runs
+                 ;; `cargo install --path .`, which fails for a virtual
+                 ;; workspace root with no [package].  Copy the four
+                 ;; workshop binaries out of target/release/ manually.
+                 (replace 'install
+                   (lambda* (#:key outputs #:allow-other-keys)
+                     (let ((bin (string-append (assoc-ref outputs "out")
+                                               "/bin")))
+                       (mkdir-p bin)
+                       (for-each
+                        (lambda (name)
+                          (install-file (string-append "target/release/" name)
+                                        bin))
+                        '("ibs" "ibd" "ancestry" "jacquard")))))
+                 ;; lib_wfa2's build.rs builds WFA2-lib from a git
+                 ;; submodule we don't have.  Replace it with a stub
+                 ;; that links against the system wfa2-lib-static;
+                 ;; same pattern impg uses for its lib_wfa2 checkout.
+                 (add-before 'build 'patch-lib-wfa2-use-system
+                   (lambda _
+                     (let ((br "guix-vendor/rust-lib-wfa2-0.1.0.8859b6a-checkout/build.rs"))
+                       (chmod br #o644)
+                       (call-with-output-file br
+                         (lambda (port)
+                           (display
+                            (string-append
+                             "fn main() {\n"
+                             "    println!(\"cargo:rustc-link-lib=static=wfa\");\n"
+                             "    println!(\"cargo:rustc-link-lib=gomp\");\n"
+                             "    println!(\"cargo:rustc-link-search=native="
+                             #$(file-append wfa2-lib-static "/lib") "\");\n"
+                             "}\n")
+                            port))))
+                     ;; bindings_wfa.rs uses u32::cast_signed /
+                     ;; i32::cast_unsigned, both unstable before Rust
+                     ;; 1.87.  Replace with explicit `as` casts.
+                     (substitute*
+                         "guix-vendor/rust-lib-wfa2-0.1.0.8859b6a-checkout/src/bindings_wfa.rs"
+                       (("u32::cast_signed\\(self\\._bitfield_1\\.get\\(0usize, 24u8\\) as u32\\)")
+                        "((self._bitfield_1.get(0usize, 24u8) as u32) as i32)")
+                       (("u32::cast_signed\\(<")
+                        "((<")
+                       (("            \\) as u32\\)")
+                        "            ) as u32) as i32)")
+                       (("i32::cast_unsigned\\(val\\)")
+                        "(val as u32)")
+                       (("i32::cast_unsigned\\(_flags2\\)")
+                        "(_flags2 as u32)")))))))
+      (native-inputs (list pkg-config))
+      (inputs (cons* wfa2-lib-static
+                     zlib
+                     (list zstd "lib")
+                     (cargo-inputs 'impop
+                                   #:module '(gn packages pangenome-rust))))
+      (home-page "https://github.com/MarsicoFL/memimpopk")
+      (synopsis "Population genomics for implicit pangenomes")
+      (description "impop_k provides IBS, IBD, local-ancestry, and
+Jacquard relatedness inference directly on per-window pairwise
+identity matrices produced by @code{impg similarity}, without ever
+calling variants or building a VCF.  Each binary wraps a hidden
+Markov model whose emissions are conditional probabilities over
+per-window identity, with transitions calibrated by recombination
+rate.")
+      (license license:expat))))
+
 (define mempang-workshop-pangenomes
   ;; pangenomes propagates the current vg (1.72.0) and wfmash-0.14
   ;; release; the workshop is pinned to vg 1.71.0 and a wfmash-0.14
@@ -1708,8 +1861,16 @@ kfilt, miniprot, pangene, wally, and vcfbub.")
      (list mempang-workshop-pangenomes
            vg-1.71
            wfmash-0.14-snapshot
-           ;; libgcc_s.so.1 for the prebuilt impop_k (Part 6) binaries
-           ;; that ship with the MarsicoFL/memimpopk repo.
+           ;; impop_k (Part 6): the source-built {ibs,ibd,ancestry,
+           ;; jacquard} from MarsicoFL/memimpopk's bundled source/.
+           ;; The workshop's memimpopk clone still ships its own
+           ;; prebuilt bin/, but with impop on PATH attendees who
+           ;; can't run the prebuilts (older glibc, ARM, ...) get
+           ;; working binaries automatically.
+           impop
+           ;; libgcc_s.so.1 for the memimpopk-prebuilt impop_k
+           ;; binaries; impop above is Guix-built and self-contained
+           ;; but the upstream prebuilts still need this.
            (list gcc "lib")
            bc
            bcftools