diff --git a/lib/build.js b/lib/build.js
index 740e23f..3e462da 100644
--- a/lib/build.js
+++ b/lib/build.js
@@ -2,6 +2,7 @@ const fs = require('fs');
 const path = require('path');
 const glob = require('glob');
 const mkdirp = require('mkdirp');
+const rimraf = require('rimraf');
 const { client, server } = require('./utils/compilers.js');
 const create_app = require('./utils/create_app.js');
 const generate_asset_cache = require('./utils/generate_asset_cache.js');
@@ -9,6 +10,7 @@ const { dest } = require('./config.js');
 
 module.exports = () => {
 	mkdirp(dest);
+	rimraf.sync(path.join(dest, '**/*'));
 
 	// create main.js and server-routes.js
 	create_app();