diff --git a/auto/config b/auto/config
index d95a7f9..3ffcfb1 100755
--- a/auto/config
+++ b/auto/config
@@ -23,6 +23,8 @@ IMAGE_TYPE=$(echo $FLAVOR | cut -f2 -d-)
 
 CURRENT_DATE=$(date +%Y%m%d)
 
+export SOURCE_DATE_EPOCH=$(date +%s)
+
 # repository URL
 PUREOS_REPO="https://repo.puri.sm/pureos"