diff --git a/build-package.sh b/build-package.sh
index c1dc2829bc..a4b2b9dc1b 100755
--- a/build-package.sh
+++ b/build-package.sh
@@ -3,7 +3,7 @@
 
 set -e -o pipefail -u
 
-SOURCE_DATE_EPOCH=$(date "+%s")
+SOURCE_DATE_EPOCH=$(git log -1 --pretty=%ct 2>/dev/null || date "+%s")
 export SOURCE_DATE_EPOCH
 
 : "${TMPDIR:=/tmp}"