diff --git a/build_image b/build_image
index af1d1869c9..e033414df0 100755
--- a/build_image
+++ b/build_image
@@ -10,7 +10,7 @@
 # build the Chrome OS image using only pre-built binary packages.
 
 SCRIPT_ROOT=$(dirname $(readlink -f "$0"))
-. "${SCRIPT_ROOT}/build_library/build_common.sh" || exit 1
+. "${SCRIPT_ROOT}/common.sh" || exit 1
 
 # Developer-visible flags.
 DEFINE_string board "${DEFAULT_BOARD}" \
diff --git a/build_library/build_common.sh b/build_library/build_common.sh
deleted file mode 100644
index 92e2ee6391..0000000000
--- a/build_library/build_common.sh
+++ /dev/null
@@ -1,49 +0,0 @@
-# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# Common library file to be sourced by build_image,
-# mod_image_for_test.sh, and mod_image_for_recovery.sh.  This
-# file ensures that library source files needed by all the scripts
-# are included once, and also takes care of certain bookeeping tasks
-# common to all the scripts.
-
-# SCRIPT_ROOT must be set prior to sourcing this file
-. "${SCRIPT_ROOT}/common.sh" || exit 1
-
-# All scripts using this file must be run inside the chroot.
-restart_in_chroot_if_needed "$@"
-
-INSTALLER_ROOT=/usr/lib/installer
-. "${INSTALLER_ROOT}/chromeos-common.sh" || exit 1
-
-locate_gpt
-
-should_build_image() {
-  # Fast pass back if we should build all incremental images.
-  local image_name
-  local image_to_build
-
-  for image_name in "$@"; do
-    for image_to_build in ${IMAGES_TO_BUILD}; do
-      [ "${image_to_build}" = "${image_name}" ] && return 0
-    done
-  done
-
-  return 1
-}
-
-# Utility function for creating a copy of an image prior to
-# modification from the BUILD_DIR:
-#  $1: source filename
-#  $2: destination filename
-copy_image() {
-  local src="${BUILD_DIR}/$1"
-  local dst="${BUILD_DIR}/$2"
-  if should_build_image $1; then
-    echo "Creating $2 from $1..."
-    cp --sparse=always "${src}" "${dst}" || die "Cannot copy $1 to $2"
-  else
-    mv "${src}" "${dst}" || die "Cannot move $1 to $2"
-  fi
-}
diff --git a/build_library/build_image_util.sh b/build_library/build_image_util.sh
index 517b3b4f0b..fb46c20975 100755
--- a/build_library/build_image_util.sh
+++ b/build_library/build_image_util.sh
@@ -55,6 +55,35 @@ parse_build_image_args() {
   get_images_to_build ${FLAGS_ARGV}
 }
 
+should_build_image() {
+  # Fast pass back if we should build all incremental images.
+  local image_name
+  local image_to_build
+
+  for image_name in "$@"; do
+    for image_to_build in ${IMAGES_TO_BUILD}; do
+      [ "${image_to_build}" = "${image_name}" ] && return 0
+    done
+  done
+
+  return 1
+}
+
+# Utility function for creating a copy of an image prior to
+# modification from the BUILD_DIR:
+#  $1: source filename
+#  $2: destination filename
+copy_image() {
+  local src="${BUILD_DIR}/$1"
+  local dst="${BUILD_DIR}/$2"
+  if should_build_image $1; then
+    echo "Creating $2 from $1..."
+    cp --sparse=always "${src}" "${dst}" || die "Cannot copy $1 to $2"
+  else
+    mv "${src}" "${dst}" || die "Cannot move $1 to $2"
+  fi
+}
+
 check_blacklist() {
   info "Verifying that the base image does not contain a blacklisted package."
   info "Generating list of packages for ${BASE_PACKAGE}."
diff --git a/image_to_vm.sh b/image_to_vm.sh
index 3c77700ad4..d2bf6823b5 100755
--- a/image_to_vm.sh
+++ b/image_to_vm.sh
@@ -13,15 +13,8 @@
 SCRIPT_ROOT=$(dirname "$(readlink -f "$0")")
 . "${SCRIPT_ROOT}/common.sh" || exit 1
 . "${BUILD_LIBRARY_DIR}/toolchain_util.sh" || exit 1
-. "${BUILD_LIBRARY_DIR}/build_common.sh" || exit 1
 . "${BUILD_LIBRARY_DIR}/build_image_util.sh" || exit 1
 . "${BUILD_LIBRARY_DIR}/vm_image_util.sh" || exit 1
-
-# Need to be inside the chroot to load chromeos-common.sh
-assert_inside_chroot
-
-# Load functions and constants for chromeos-install
-. /usr/lib/installer/chromeos-common.sh || exit 1
 . "${SCRIPT_ROOT}/lib/cros_vm_constants.sh" || exit 1
 
 # Flags
@@ -96,9 +89,6 @@ else
   set_vm_paths "${FLAGS_from}" "${FLAGS_to}" "${CHROMEOS_IMAGE_NAME}"
 fi
 
-locate_gpt
-legacy_offset_size_export ${VM_SRC_IMG}
-
 # Make sure things are cleaned up on failure
 trap vm_cleanup EXIT