diff --git a/make/projects-dir.mk b/make/projects-dir.mk
index 508ddf98..6240e832 100644
--- a/make/projects-dir.mk
+++ b/make/projects-dir.mk
@@ -87,8 +87,8 @@ purge:
 update pull: purge cvs-update git-pull
 	touch pull.done
 
-rebuild-subdirs:
-	FORCE_REBUILD_SUBDIRS=true make all
+subdirs-%:
+	FORCE_REBUILD_SUBDIRS=true make $*
 
 cvs-update:
 	rm -f $@.done