diff --git a/Buildfile b/Buildfile
index 431f9a4..a24f059 100644
--- a/Buildfile
+++ b/Buildfile
@@ -8,5 +8,8 @@ add:
   mkdir packages/$(name)
   cp -r template/* packages/$(name)/
 
+clean:
+  rm -rf packages/*/lib
+
 test:
   jest