diff --git a/webpack.config.js b/webpack.config.js
index 1ff4186e..ffa99f8c 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -169,7 +169,11 @@ module.exports = function (_, env) {
       ]
     },
     plugins: [
-      new webpack.IgnorePlugin(/(fs|crypto|path)/, /\/codecs\//),
+      new webpack.IgnorePlugin(
+        /(fs|crypto|path)/,
+        new RegExp(`${path.sep}codecs${path.sep}`)
+      ),
+
       // Pretty progressbar showing build progress:
       new ProgressBarPlugin({
         format: '\u001b[90m\u001b[44mBuild\u001b[49m\u001b[39m [:bar] \u001b[32m\u001b[1m:percent\u001b[22m\u001b[39m (:elapseds) \u001b[2m:msg\u001b[22m\r',