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-rw-r--r--tests/packages.scm4
1 files changed, 4 insertions, 0 deletions
diff --git a/tests/packages.scm b/tests/packages.scm
index 005e605e83..8c2e6b9d08 100644
--- a/tests/packages.scm
+++ b/tests/packages.scm
@@ -35,6 +35,10 @@
 (define %store
   (false-if-exception (open-connection)))
 
+(when %store
+  ;; Make sure we build everything by ourselves.
+  (set-build-options %store #:use-substitutes? #f))
+
 (define %bootstrap-inputs
   ;; Use the bootstrap inputs so it doesn't take ages to run these tests.
   ;; This still involves building GNU Make and GNU Diffutils.