diff --git a/TODO b/TODO
index b53842137e..fd0c7e9f30 100644
--- a/TODO
+++ b/TODO
@@ -9,3 +9,6 @@ buildsystem:
   - built-in $PKG_DIR/unpack replacement
   - rm -rf .$TARGET_NAME/ by default for converted packages
   - rm -rf $INSTALL/ by edfault for converted packages
+  - always trigger full pkg rebuild (unpack+build) on meta/package.mk change
+    -- we can use this even when we drop a new patch in patches/. or when we
+       require a rebuild for some other reason. with a simple PKG_REV bump