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-rw-r--r--guix/build/gnu-build-system.scm3
1 files changed, 3 insertions, 0 deletions
diff --git a/guix/build/gnu-build-system.scm b/guix/build/gnu-build-system.scm
index ff7646b22c..92e15d131e 100644
--- a/guix/build/gnu-build-system.scm
+++ b/guix/build/gnu-build-system.scm
@@ -576,6 +576,9 @@ in order. Return #t if all the PHASES succeeded, #f otherwise."
;; Encoding/decoding errors shouldn't be silent.
(fluid-set! %default-port-conversion-strategy 'error)
+ ;; Avoid non-determinism related to generated timestamps.
+ (setenv "SOURCE_DATE_EPOCH" "1")
+
;; The trick is to #:allow-other-keys everywhere, so that each procedure in
;; PHASES can pick the keyword arguments it's interested in.
(every (match-lambda