diff --git a/release.sh b/release.sh
index 94a61071..e7317619 100644
--- a/release.sh
+++ b/release.sh
@@ -41,6 +41,9 @@ if [ $1 = "prepare" ]; then
 	composer install --prefer-dist --optimize-autoloader
 	npm install
 
+	# node_modules is useless, we already have copy in tools/ext
+	rm -R node_modules
+
 	echo "Now you can make changes to $dir. When you are ready, type 'release.sh pack'"
 	exit
 fi