diff --git a/Makefile b/Makefile
index 3e5421cb3..dca36d4ed 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,5 @@
 pre:
+	bin/python setup.py develop
 	bin/python selftest.py
 	bin/python Tests/run.py
 	check-manifest