diff --git a/poky/meta/classes/image-artifact-names.bbclass b/poky/meta/classes/image-artifact-names.bbclass
index 5ab8f1b..3ac8dd7 100644
--- a/poky/meta/classes/image-artifact-names.bbclass
+++ b/poky/meta/classes/image-artifact-names.bbclass
@@ -2,11 +2,11 @@
 # Specific image creation and rootfs population info.
 ##################################################################
 
-IMAGE_BASENAME = "${PN}"
-IMAGE_VERSION_SUFFIX = "-${DATETIME}"
+IMAGE_BASENAME ?= "${PN}"
+IMAGE_VERSION_SUFFIX ?= "-${DATETIME}"
 IMAGE_VERSION_SUFFIX[vardepsexclude] += "DATETIME"
-IMAGE_NAME = "${IMAGE_BASENAME}-${MACHINE}${IMAGE_VERSION_SUFFIX}"
-IMAGE_LINK_NAME = "${IMAGE_BASENAME}-${MACHINE}"
+IMAGE_NAME ?= "${IMAGE_BASENAME}-${MACHINE}${IMAGE_VERSION_SUFFIX}"
+IMAGE_LINK_NAME ?= "${IMAGE_BASENAME}-${MACHINE}"
 
 # IMAGE_NAME is the base name for everything produced when building images.
 # The actual image that contains the rootfs has an additional suffix (.rootfs