diff --git a/diskimage_builder/elements/openeuler-minimal/pre-install.d/00-setup-mirror.bash b/diskimage_builder/elements/openeuler-minimal/pre-install.d/00-setup-mirror.bash
old mode 100644
new mode 100755
index 312f0345..339c8961
--- a/diskimage_builder/elements/openeuler-minimal/pre-install.d/00-setup-mirror.bash
+++ b/diskimage_builder/elements/openeuler-minimal/pre-install.d/00-setup-mirror.bash
@@ -1,3 +1,11 @@
+#!/bin/bash
+
+if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
+    set -x
+fi
+set -eu
+set -o pipefail
+
 if [ -n "${DIB_DISTRIBUTION_MIRROR:-}" ]; then
     # Only set the mirror for OS, everything, EPOL and update repositories,
     # The others (debuginfo and source) aren't mirrored since they do not exist on all mirrors