diff --git a/scripts/build-webpack.js b/scripts/build-webpack.js
index e310c777f7..deaa903b70 100755
--- a/scripts/build-webpack.js
+++ b/scripts/build-webpack.js
@@ -121,7 +121,7 @@ const compilerLegacy = webpack({
     rules: [
       {
         test: /\.js$/,
-        exclude: /node_modules\/(?!inquirer)/,
+        exclude: /node_modules[\\\/](?!inquirer)/,
         use: [
           {
             loader:'babel-loader',