diff --git a/poky/meta/classes/kernel-devicetree.bbclass b/poky/meta/classes/kernel-devicetree.bbclass
index d4f8864..27a4905 100644
--- a/poky/meta/classes/kernel-devicetree.bbclass
+++ b/poky/meta/classes/kernel-devicetree.bbclass
@@ -1,8 +1,11 @@
 # Support for device tree generation
-PACKAGES_append = " \
-    ${KERNEL_PACKAGE_NAME}-devicetree \
-    ${@[d.getVar('KERNEL_PACKAGE_NAME') + '-image-zimage-bundle', ''][d.getVar('KERNEL_DEVICETREE_BUNDLE') != '1']} \
-"
+python () {
+    if not bb.data.inherits_class('nopackages', d):
+        d.appendVar("PACKAGES", " ${KERNEL_PACKAGE_NAME}-devicetree")
+        if d.getVar('KERNEL_DEVICETREE_BUNDLE') == '1':
+            d.appendVar("PACKAGES", " ${KERNEL_PACKAGE_NAME}-image-zimage-bundle")
+}
+
 FILES_${KERNEL_PACKAGE_NAME}-devicetree = "/${KERNEL_IMAGEDEST}/*.dtb /${KERNEL_IMAGEDEST}/*.dtbo"
 FILES_${KERNEL_PACKAGE_NAME}-image-zimage-bundle = "/${KERNEL_IMAGEDEST}/zImage-*.dtb.bin"