JavaScriptExpert
diff --git a/‎README.md‎
Lines changed: 14 additions & 1 deletion b/‎README.md‎
Lines changed: 14 additions & 1 deletion
diff --git a/‎packages/graphpack/config/index.js‎
Lines changed: 2 additions & 1 deletion b/‎packages/graphpack/config/index.js‎
Lines changed: 2 additions & 1 deletion
@@ -236,7 +236,20 @@ For custom configuration you can create a `graphpack` config file in [cosmiconfi
 
 ### Customize Webpack configuration
 
-To extend webpack, you can define a function that extends its config via `graphpack.config.js`.
+To extend webpack, you can define a function that extends its config via the config file:
+
+```js
+// graphpack.config.js
+module.exports = {
+  webpack: ({ config, webpack }) => {
+    // Add customizations to config
+    // Important: return the modified config
+    return config;
+  },
+};
+```
+
+> Note that this file is not going through babel transformation.
 
 ## Acknowledgements
 
 
@@ -1,4 +1,5 @@
 const cosmiconfig = require('cosmiconfig');
+const webpack = require('webpack');
 const defaultConfig = require('./webpack.config');
 
 const explorer = cosmiconfig('graphpack').search();
@@ -12,7 +13,7 @@ const loadWebpackConfig = async () => {
     : {};
 
   if (typeof userConfig.webpack === 'function') {
-    return userConfig.webpack(defaultConfig);
+    return userConfig.webpack({ config: defaultConfig, webpack });
   }
 
   return defaultConfig;