diff --git a/build_sdcard.sh b/build_sdcard.sh
index f580e47fa..a7b77c7d0 100755
--- a/build_sdcard.sh
+++ b/build_sdcard.sh
@@ -1,4 +1,5 @@
-#!/bin/bash
+#!/usr/bin/env sh
+#set -x
 
 #########################################################################
 # Build your SD card image based on: 2021-10-30-raspios-bullseye-arm64.zip