diff --git a/Makefile b/Makefile
index ff6b5a0a..4853c4b8 100644
--- a/Makefile
+++ b/Makefile
@@ -2,6 +2,8 @@
 
 # user-facing targets
 
+.PHONY: index
+
 all: clone index
 
 clone: cleancache cache