diff --git a/make/projects-dir.mk b/make/projects-dir.mk
index d6071f3d..dca583ee 100644
--- a/make/projects-dir.mk
+++ b/make/projects-dir.mk
@@ -29,7 +29,7 @@ EXCLUDE_FROM_BUILD = \
 
 all:
 
-all clean:
+all clean: config.done
 	python ./ytools/devutil/scripts/build.py -b $(shell pwd) $@ $(filter-out $(EXCLUDE_FROM_BUILD),$(PROJECTS))
 
 clean-dirs:
@@ -79,3 +79,6 @@ check-conv:
 projects.txt:
 	echo $(PROJECTS) | sed 's/ /\n/g; s%/%%g' > $@
 
+config.done:
+	make -C ytools config
+