diff --git a/Makefile b/Makefile
index d7bf90fe..6639f668 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 bootstrap:
-	pip install -e . [tests]
+	pip install -e "file://`pwd`#egg=raven[tests]"
 	make setup-git
 
 test: bootstrap lint