diff --git a/Makefile b/Makefile
index ecb5806..6de3860 100644
--- a/Makefile
+++ b/Makefile
@@ -60,7 +60,7 @@ ci:
 	# dependencies
 	mv deps old-deps
 	mv fennel old-fennel
-	$(MAKE) FENNEL=old-fennel deps
+	$(MAKE) FENNEL=./old-fennel deps
 	diff -r deps old-deps
 	diff -r fennel old-fennel