1 files changed, 11 insertions, 0 deletions
diff --git a/third_party/nix/mk/clean.mk b/third_party/nix/mk/clean.mk
new file mode 100644
index 0000000000..ce9afb3b0d
--- /dev/null
+++ b/third_party/nix/mk/clean.mk
@@ -0,0 +1,11 @@
+clean-files :=
+
+clean:
+	$(suppress) rm -fv -- $(clean-files)
+
+dryclean:
+	@for i in $(clean-files); do if [ -e $$i ]; then echo $$i; fi; done | sort
+
+print-top-help += \
+  echo "  clean: Delete generated files"; \
+  echo "  dryclean: Show what files would be deleted by 'make clean'";