diff --git a/rootfs_overlay/conf.sh b/rootfs_overlay/conf.sh
index 5a4d1e7..4cb23a8 100755
--- a/rootfs_overlay/conf.sh
+++ b/rootfs_overlay/conf.sh
@@ -1,2 +1,2 @@
-#!/usr/bin/env bash
+#!/bin/sh
 zcat /proc/config.gz