diff --git a/build/get_container_id.sh b/build/get_container_id.sh
old mode 100755
new mode 100644
index d262287..59d134b
--- a/build/get_container_id.sh
+++ b/build/get_container_id.sh
@@ -33,7 +33,7 @@ impl_container_id_by_cgroup() {
 DOCKER="${DOCKER:-docker}"
 
 if [ -z "${CONTAINER+x}" ] && [ -n "$DOCKER" ]; then
-  CONTAINER="$(container_id "$@")" || true
+  CONTAINER="$(container_id "$@")"
 fi
 
 echo "$CONTAINER"