not cleanup v4 folder
diff --git a/bin/build.js b/bin/build.js
index bbbd8aa..94fefe3 100644
--- a/bin/build.js
+++ b/bin/build.js
@@ -107,6 +107,7 @@
     const srcRelativePathList = await globby([
         '**/*',
         '!.*', // .git .gitignore .htaccess
+        '!v4/**/*', // v4 website
         '!README.md'
     ], {
         cwd: destDir