diff --git a/classes/obmc-phosphor-image.bbclass b/classes/obmc-phosphor-image.bbclass
index ce54777..c715ded 100644
--- a/classes/obmc-phosphor-image.bbclass
+++ b/classes/obmc-phosphor-image.bbclass
@@ -36,15 +36,17 @@
         ssh-server-dropbear \
         "
 
-IMAGE_INSTALL += " \
-        bash \
+CORE_IMAGE_EXTRA_INSTALL_append = " bash \
         packagegroup-obmc-phosphor-apps-extras \
         i2c-tools \
         screen \
         inarp \
         obmc-console \
+        ${OBMC_IMAGE_EXTRA_INSTALL} \
         "
 
+OBMC_IMAGE_EXTRA_INSTALL ?= ""
+
 def build_overlay(d):
         if bb.utils.contains("IMAGE_FSTYPES", "overlay", "overlay", "0", d) != "0":
                 return "image-overlay"
diff --git a/conf/machine/include/obmc-bsp-common.inc b/conf/machine/include/obmc-bsp-common.inc
index 260cc90..8d1fd7e 100644
--- a/conf/machine/include/obmc-bsp-common.inc
+++ b/conf/machine/include/obmc-bsp-common.inc
@@ -15,7 +15,7 @@
 
 IMAGE_FSTYPES += "overlay"
 IMAGE_FSTYPES += "cpio.${INITRAMFS_CTYPE}.u-boot"
-IMAGE_INSTALL += "u-boot-fw-utils"
+OBMC_IMAGE_EXTRA_INSTALL_append = " u-boot-fw-utils"
 
 IMAGE_CLASSES += "obmc-phosphor-image_types_uboot"