diff --git a/packages/webpack/src/utils/with-nx.ts b/packages/webpack/src/utils/with-nx.ts
index 6b4f29b6a67b97..67c22e9e60f729 100644
--- a/packages/webpack/src/utils/with-nx.ts
+++ b/packages/webpack/src/utils/with-nx.ts
@@ -164,7 +164,7 @@ export function withNx(opts?: { skipTypeChecking?: boolean }) {
       profile: options.statsJson,
       resolve: {
         ...config.resolve,
-        extensions,
+        extensions: [...extensions, ...config.resolve.extensions],
         alias: options.fileReplacements.reduce(
           (aliases, replacement) => ({
             ...aliases,
@@ -175,7 +175,7 @@ export function withNx(opts?: { skipTypeChecking?: boolean }) {
         plugins: [
           new TsconfigPathsPlugin({
             configFile: options.tsConfig,
-            extensions,
+            extensions: [...extensions, ...config.resolve.extensions],
             mainFields,
           }),
         ],
@@ -231,6 +231,7 @@ export function withNx(opts?: { skipTypeChecking?: boolean }) {
         // Enabled for performance
         unsafeCache: true,
         rules: [
+          ...config.module.rules,
           options.sourceMap && {
             test: /\.js$/,
             enforce: 'pre' as const,