diff --git a/Makefile b/Makefile
index 62667e15..161f6d0f 100644
--- a/Makefile
+++ b/Makefile
@@ -34,6 +34,7 @@ py_env: requirements.txt
 	rm -rf py_env
 	virtualenv py_env
 	bash -c 'source py_env/bin/activate && \
+		pip install -e . && \
 		pip install -r requirements.txt'
 
 clean: