diff --git a/Makefile b/Makefile
index 35889e1..fd76c47 100644
--- a/Makefile
+++ b/Makefile
@@ -10,3 +10,4 @@ clean::
 	find . -name '*pyc' | xargs rm -f
 	rm -f .coverage
 	rm -rf tests/*testdb*
+	rm -rf nilmdb.egg-info/ build/ nilmdb/server/*.c nilmdb/server/*.so