diff --git a/Makefile b/Makefile
index d9aeed0ee8..1e6aaf6e01 100644
--- a/Makefile
+++ b/Makefile
@@ -42,6 +42,10 @@ watch: clean
 	make clean-lib
 	BABEL_ENV=development ./node_modules/.bin/gulp watch
 
+watch-babylon:
+	cd packages/babylon; \
+	./node_modules/.bin/rollup -c -w
+
 flow:
 	./node_modules/.bin/flow check --strip-root