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-rw-r--r--tests/derivations.scm3
1 files changed, 3 insertions, 0 deletions
diff --git a/tests/derivations.scm b/tests/derivations.scm
index e87662a198..3903a563a8 100644
--- a/tests/derivations.scm
+++ b/tests/derivations.scm
@@ -524,6 +524,9 @@ Deriver: ~a~%"
(basename
(derivation-file-name drv))))) ; Deriver
+ ;; Make sure substitutes are usable.
+ (set-build-options store #:use-substitutes? #t)
+
(let-values (((build download)
(derivation-prerequisites-to-build store drv))
((build* download*)