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-rw-r--r--doc/guix.texi17
1 files changed, 16 insertions, 1 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 3f646cd2ca..25efba118f 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -5053,7 +5053,7 @@ Yet another option is to produce a SquashFS image with the following
command:
@example
-guix pack -f squashfs guile emacs geiser
+guix pack -f squashfs bash guile emacs geiser
@end example
@noindent
@@ -5088,6 +5088,21 @@ package names passed on the command line or in the manifest file.
This produces a SquashFS image containing all the specified binaries and
symlinks, as well as empty mount points for virtual file systems like
procfs.
+
+@quotation Note
+Singularity @emph{requires} you to provide @file{/bin/sh} in the image.
+For that reason, @command{guix pack -f squashfs} always implies @code{-S
+/bin=bin}. Thus, your @command{guix pack} invocation must always start
+with something like:
+
+@example
+guix pack -f squashfs bash @dots{}
+@end example
+
+If you forget the @code{bash} (or similar) package, @command{singularity
+run} and @command{singularity exec} will fail with an unhelpful ``no
+such file or directory'' message.
+@end quotation
@end table
@cindex relocatable binaries