diff --git a/build_sdcard.sh b/build_sdcard.sh
index 414bb9f61..f580e47fa 100755
--- a/build_sdcard.sh
+++ b/build_sdcard.sh
@@ -1,6 +1,4 @@
-#!/usr/bin/env sh
-
-#set -x
+#!/bin/bash
 
 #########################################################################
 # Build your SD card image based on: 2021-10-30-raspios-bullseye-arm64.zip