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-rw-r--r--guix/build/python-build-system.scm2
1 files changed, 1 insertions, 1 deletions
diff --git a/guix/build/python-build-system.scm b/guix/build/python-build-system.scm
index 6775cc4396..8025b7fec6 100644
--- a/guix/build/python-build-system.scm
+++ b/guix/build/python-build-system.scm
@@ -140,7 +140,7 @@ installed with setuptools."
"Set the 'SOURCE_DATE_EPOCH' environment variable."
;; Use zero as the timestamp in .pyc files so that builds are deterministic.
;; TODO: Remove it when this variable is set in GNU:%STANDARD-PHASES.
- (setenv "SOURCE_DATE_EPOCH" "0"))
+ (setenv "SOURCE_DATE_EPOCH" "1"))
(define %standard-phases
;; 'configure' and 'build' phases are not needed. Everything is done during