diff --git a/core/cleanspec.mk b/core/cleanspec.mk
index c85c450..5d399a7 100644
--- a/core/cleanspec.mk
+++ b/core/cleanspec.mk
@@ -22,7 +22,7 @@
 # IDEALLY, THOSE STEPS SHOULD BE DONE ATOMICALLY.
 # **********************************************************************
 #
-INTERNAL_CLEAN_BUILD_VERSION := 4
+INTERNAL_CLEAN_BUILD_VERSION := 5
 #
 # ***********************************************************************
 # Do not touch INTERNAL_CLEAN_BUILD_VERSION if you've added a clean step!