diff --git a/build_library/cgpt_shell.sh b/build_library/cgpt_shell.sh
index 68298f113d..dedd0542aa 100644
--- a/build_library/cgpt_shell.sh
+++ b/build_library/cgpt_shell.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 # Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
@@ -6,11 +6,12 @@
 # This script is automatically generated by @SCRIPT_GENERATOR@
 # Do not edit!
 
-if ! type numsectors &>/dev/null; then
-  if [[ -f "/usr/sbin/chromeos-common.sh" ]]; then
-      . "/usr/sbin/chromeos-common.sh"
+if ! type numsectors >/dev/null 2>&1; then
+  if [ -f "/usr/sbin/chromeos-common.sh" ]; then
+    . "/usr/sbin/chromeos-common.sh"
   else
-    die "Can't load chromeos-common.sh, dying!"
+    echo "Can't load chromeos-common.sh, dying!" 1>&2
+    exit 1
   fi
 fi
 locate_gpt
@@ -22,13 +23,13 @@ create_image() {
   local dev=$1
   local min_disk_size=$2
   local block_size=$3
-  if [[ -b "${dev}" ]]; then
+  if [ -b "${dev}" ]; then
     # Zap any old partitions (otherwise gpt complains).
     dd if=/dev/zero of="${dev}" conv=notrunc bs=512 count=32
     dd if=/dev/zero of="${dev}" conv=notrunc bs=512 \
       seek=$((${min_disk_size} - 1 - 33)) count=33
   else
-    if [[ ! -e "${dev}" ]]; then
+    if [ ! -e "${dev}" ]; then
       dd if=/dev/zero of="${dev}" bs=${block_size} count=1 \
         seek=$((${min_disk_size} - 1))
     fi