diff --git a/build_image b/build_image
index 5305f1434c..a1d7a0a716 100755
--- a/build_image
+++ b/build_image
@@ -205,7 +205,7 @@ if [ ${FLAGS_factory_install} -eq ${FLAGS_TRUE} ] ; then
 fi
 
 emerge_to_image() {
-  sudo -E ${EMERGE_BOARD_CMD} --root-deps=rdeps --usepkgonly \
+  sudo -E ${EMERGE_BOARD_CMD} --root-deps=rdeps --usepkgonly -v \
     "$@" ${EMERGE_JOBS}
 }
 
@@ -363,7 +363,7 @@ EOF
 }
 
 # Modifies an existing image to add development packages
-update_dev_packages() {
+install_dev_packages() {
   local image_name=$1
 
   echo "Adding developer packages to ${image_name}"
@@ -380,7 +380,7 @@ update_dev_packages() {
     root_dev_dir="${ROOT_FS_DIR}/usr/local"
 
   # Install developer packages described in chromeos-dev.
-  emerge_to_image --root="${root_dev_dir}" -uDNv chromeos-dev
+  emerge_to_image --root="${root_dev_dir}" chromeos-dev
 
   # Install the bare necessary files so that the "emerge" command works
   if [ ${FLAGS_statefuldev} -eq ${FLAGS_TRUE} ]; then
@@ -796,7 +796,7 @@ load_kernel_test "${OUTPUT_DIR}/${PRISTINE_IMAGE_NAME}" \
 # Create a developer image based on the chromium os base image.
 if [ ${FLAGS_withdev} -eq ${FLAGS_TRUE} ] ; then
   cp ${PRISTINE_IMG} ${DEVELOPER_IMG}
-  update_dev_packages ${DEVELOPER_IMAGE_NAME}
+  install_dev_packages ${DEVELOPER_IMAGE_NAME}
   ${SCRIPTS_DIR}/bin/cros_make_image_bootable "${OUTPUT_DIR}" \
                                               "${DEVELOPER_IMAGE_NAME}" \
                                               --force_developer_mode