diff --git a/tool/builddir/build.mk b/tool/builddir/build.mk
index ccb63cc65..e4d11b51f 100644
--- a/tool/builddir/build.mk
+++ b/tool/builddir/build.mk
@@ -111,8 +111,8 @@ init_progress_log:
 	@echo "# Library build progress log - generated by dep_prg.mk and dep_lib.mk" >> $(LIB_PROGRESS_LOG)
 	@echo "#" >> $(LIB_PROGRESS_LOG)
 
-.PHONY: init_libdep_file $(dir $(LIB_DEP_FILE))
-init_libdep_file:
+.PHONY: init_libdep_file
+init_libdep_file: $(dir $(LIB_DEP_FILE))
 	@echo "checking library dependencies..."
 	@(echo "#"; \
 	  echo "# Library dependencies for build '$(DST_DIRS)'"; \