diff --git a/build/rbac/keep-rbac-yaml.sh b/build/rbac/keep-rbac-yaml.sh
index 31ddb84d6..40937a3b4 100755
--- a/build/rbac/keep-rbac-yaml.sh
+++ b/build/rbac/keep-rbac-yaml.sh
@@ -1,5 +1,9 @@
 #!/usr/bin/env bash
 set -eEuo pipefail
+# setting locate `LC_ALL=C` because different OS do files sorting differently, 
+# so setting a common behaviour, `C` sorting order is based on the byte values,
+# Reference: https://blog.zhimingwang.org/macos-lc_collate-hunt
+LC_ALL=C
 
 # READS FROM STDIN
 # WRITES TO STDOUT