diff --git a/Makefile b/Makefile
index 45ac0b8f2..7c9f6cfba 100644
--- a/Makefile
+++ b/Makefile
@@ -61,7 +61,7 @@ help:
 clean:
 	$(MAKE) stop
 	-rm -rf node_modules .npm .cache assets/icons assets/favicons static well-known
-	-rm -rf .stack-work .stack-work-build .stack-work-run .stack-work-test .stack-work-doc
+	-rm -rf .stack-work .stack-work-build .stack-work-run .stack-work-test .stack-work-doc .stack-work.lock
 	-rm -rf bin .Dockerfile develop
 	-$(CONTAINER_COMMAND) container prune --force
 .PHONY: clean-all