diff --git a/build/findtmp b/build/findtmp
index b49c312bf..10ca8e13e 100755
--- a/build/findtmp
+++ b/build/findtmp
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 #-*-mode:sh;indent-tabs-mode:nil;tab-width:2;coding:utf-8-*-┐
 #───vi: set net ft=sh ts=2 sts=2 fenc=utf-8 :vi─────────────┘
 #