diff --git a/stm32/repro-build.sh b/stm32/repro-build.sh
index 6d2774ea..00d4c442 100644
--- a/stm32/repro-build.sh
+++ b/stm32/repro-build.sh
@@ -47,6 +47,11 @@ else
 fi
 cd ../stm32
 
+if [ -z "$SOURCE_DATE_EPOCH" ] && [ -n "$PUBLISHED_BIN" ]; then
+    DT=$(basename $PUBLISHED_BIN | cut -d "-" -f1,2,3)
+    export SOURCE_DATE_EPOCH=$(python -c 'import datetime, sys; sys.stdout.write(str(int(datetime.datetime.strptime(sys.argv[1], "%Y-%m-%dT%H%M").timestamp())))' "$DT")
+fi
+
 make setup
 make all
 make $TARGETS