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-rw-r--r--guix/scripts/pack.scm7
1 files changed, 5 insertions, 2 deletions
diff --git a/guix/scripts/pack.scm b/guix/scripts/pack.scm
index fb3c50521d..b7b4e22bbe 100644
--- a/guix/scripts/pack.scm
+++ b/guix/scripts/pack.scm
@@ -198,8 +198,11 @@ added to the pack."
(with-directory-excursion %root
(exit
(zero? (apply system* "tar"
- "-I"
- (string-join '#+(compressor-command compressor))
+ #+@(if (compressor-command compressor)
+ #~("-I"
+ (string-join
+ '#+(compressor-command compressor)))
+ #~())
"--format=gnu"
;; Avoid non-determinism in the archive. Use