diff --git a/classes/image-overlay.bbclass b/classes/image-overlay.bbclass
index 8997aae..71768a6 100644
--- a/classes/image-overlay.bbclass
+++ b/classes/image-overlay.bbclass
@@ -1,3 +1,5 @@
+PACKAGES = " "
+EXCLUDE_FROM_WORLD = "1"
 
 INITRD_IMAGE ?= "core-image-minimal-initramfs"
 INITRD ?= "${DEPLOY_DIR_IMAGE}/${INITRD_IMAGE}-${MACHINE}.cpio.${INITRD_CTYPE}${uboot}"
@@ -5,9 +7,9 @@
 IMAGE_BASETYPE ?= "squashfs-xz"
 OVERLAY_BASETYPE ?= "jffs2"
 
-IMAGE_TYPES_${PN} += "${IMAGE_BASETYPE}"
+IMAGE_TYPES += "overlay"
 
-IMAGE_TYPEDEP_overlay = "${IMAGE_BASETYPE} ${OVERLAY_BASETYPE}"
+IMAGE_TYPEDEP_overlay = "${IMAGE_BASETYPE}"
 IMAGE_TYPES_MASKED += "overlay"
 
 ROOTFS ?= "${DEPLOY_DIR_IMAGE}/${IMAGE_BASENAME}-${MACHINE}.${IMAGE_BASETYPE}"
@@ -15,4 +17,4 @@
 do_generate_flash[depends] += "${INITRD_IMAGE}:do_rootfs"
 do_generate_flash[depends] += "${PN}:do_rootfs"
 
-addtask generate_flash after do_rootfs before do_build
+addtask generate_flash before do_build