diff --git a/make/dev-utils.mk b/make/dev-utils.mk
index 870949b6..25c6cc59 100644
--- a/make/dev-utils.mk
+++ b/make/dev-utils.mk
@@ -41,7 +41,8 @@ indent-makefiles:
 		--skip-short 6 \
 		--name-regex="$(MAKEFILE_INDENT_NAME_REGEX)" \
 		--root=$(MAKEFILE_INDENT_ROOT) \
-		--min-assignments 4
+		--min-assignments 4 \
+		--maxdepth 1
 
 cleanup-spaces:
 	@$(PROCESS_TEXT_FILES_PY) cleanup-spaces \