This starts to fix the scripts so that they load from /usr/lib/crosutils

make_developer_script_runner.sh

 #!/bin/bash
 
 # Copyright (c) 2010 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.
 
 # This script modifies a base image to act as a recovery installer.
 # If a developer payload is supplied, it will be used.
 # It is very straight forward, top to bottom to show clearly what is
 # little is needed to create a developer shim to run a signed script.
 
-# Load common constants.  This should be the first executable line.
-# The path to common.sh should be relative to your script's location.
-. "$(dirname "$0")/common.sh"
+# --- BEGIN COMMON.SH BOILERPLATE ---
+# Load common CrOS utilities.  Inside the chroot this file is installed in
+# /usr/lib/crosutils.  Outside the chroot we find it relative to the script's
+# location.
+find_common_sh() {
+  local common_paths=(/usr/lib/crosutils $(dirname "$(readlink -f "$0")"))
+  local path
+
+  SCRIPT_ROOT=
+  for path in "${common_paths[@]}"; do
+    if [ -r "${path}/common.sh" ]; then
+      SCRIPT_ROOT=${path}
+      break
+    fi
+  done
+}
+
+find_common_sh
+. "${SCRIPT_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
+# --- END COMMON.SH BOILERPLATE ---
+
+# Need to be inside the chroot to load chromeos-common.sh
+assert_inside_chroot
 
 # Load functions and constants for chromeos-install
-. "$(dirname "$0")/chromeos-common.sh"
+. "/usr/lib/installer/chromeos-common.sh" || \
+  die "Unable to load /usr/lib/installer/chromeos-common.sh"
 
 DEFINE_integer statefulfs_size 2 \
   "Number of mebibytes to use for the stateful filesystem"
 DEFINE_string developer_private_key \
     "/usr/share/vboot/devkeys/kernel_data_key.vbprivk" \
     "Path to the developer's private key"
 DEFINE_string developer_keyblock \
     "/usr/share/vboot/devkeys/kernel.keyblock" \
     "Path to the developer's keyblock"
 DEFINE_string developer_script "" \
@@ skipping 85 matching lines @@
 $sudo dd if=$FLAGS_kernel_image of=$FLAGS_image bs=512 conv=notrunc \
          seek=$offset count=$kernel_sectors
 # The kernel will ignore GPT without a legacymbr.
 PMBRCODE=$(readlink -f /usr/share/syslinux/gptmbr.bin)
 # Have it legacy boot off of stateful, not that it should matter.
 $sudo $GPT boot -p -b "$PMBRCODE" -i 1 $FLAGS_image 1>&2
 
 $sudo $GPT show $FLAGS_image
 
 echo "Emitted $FLAGS_image successfully!"