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-rw-r--r--guix/derivations.scm4
1 files changed, 2 insertions, 2 deletions
diff --git a/guix/derivations.scm b/guix/derivations.scm
index b13664ce05..151bff7215 100644
--- a/guix/derivations.scm
+++ b/guix/derivations.scm
@@ -290,8 +290,8 @@ known in advance, such as a file download."
(fold-right (lambda (output-name env-vars)
(if (assoc output-name env-vars)
env-vars
- (alist-cons output-name "" env-vars)))
- '()
+ (append env-vars `((,output-name . "")))))
+ e
outputs)))
(let* ((outputs (map (lambda (name)