diff --git a/Makefile b/Makefile
index 30ed5f3..c3b53df 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,8 @@
-#.PHONY: built/%.sentinel
+define INC_DOCKER =
+ 1
+endef
+$(info Defined INC_DOCKER)
+
 include /devel/docker/docker_vars.sh
 export