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-rw-r--r--doc/guix-cookbook.texi3
1 files changed, 3 insertions, 0 deletions
diff --git a/doc/guix-cookbook.texi b/doc/guix-cookbook.texi
index e02356c117..28303df37b 100644
--- a/doc/guix-cookbook.texi
+++ b/doc/guix-cookbook.texi
@@ -280,6 +280,9 @@ they provide code to be executed during the package build process. They
look like this:
@lisp
+(use-modules (guix gexp) ;so we can write gexps
+ (gnu packages base)) ;for 'coreutils'
+
;; Below is a G-expression representing staged code.
#~(begin
;; Invoke 'ls' from the package defined by the 'coreutils'