From 97547ee82e0bd1cc2210612415b0ceb135dbba6d Mon Sep 17 00:00:00 2001
From: Pjotr Prins
Date: Mon, 10 Aug 2020 11:22:43 +0100
Subject: guix-dev

---
 .guix-dev  | 2 ++
 INSTALL.md | 6 +++++-
 2 files changed, 7 insertions(+), 1 deletion(-)
 create mode 100644 .guix-dev

diff --git a/.guix-dev b/.guix-dev
new file mode 100644
index 0000000..e33dd0a
--- /dev/null
+++ b/.guix-dev
@@ -0,0 +1,2 @@
+# Typical Guix container invocation
+~/opt/guix/bin/guix environment -C guix --ad-hoc gcc-toolchain gdb gsl openblas zlib bash ld-wrapper perl vim which
diff --git a/INSTALL.md b/INSTALL.md
index 6e5c665..29b50d6 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -52,10 +52,14 @@ To build GEMMA from source you can opt to install the build tools with GNU Guix
 
     guix package -i make gcc linux-libre-headers gsl openblas lapack glibc ld-wrapper
 
-The current build container is
+The current build container is in [guix-dev](../guix-dev)
 
     guix environment -C guix --ad-hoc gcc-toolchain gdb gsl openblas zlib bash ld-wrapper perl vim which
 
+To build with an older gcc, for example:
+
+    guix environment -C guix --ad-hoc gcc-toolchain@9.3.0 gdb gsl openblas zlib bash ld-wrapper perl vim which
+
 ### Install from source
 
 Note: Eigen is no longer required!
-- 
cgit v1.2.3