diff --git a/src/minimal_overlay/overlay_build.sh b/src/minimal_overlay/overlay_build.sh
index 62961a1cc..04fe72709 100755
--- a/src/minimal_overlay/overlay_build.sh
+++ b/src/minimal_overlay/overlay_build.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 SRC_DIR=$(pwd)