diff --git a/packages/next-swc/crates/next-core/src/next_import_map.rs b/packages/next-swc/crates/next-core/src/next_import_map.rs
index 7a433bc11b97e..6b99cb88438db 100644
--- a/packages/next-swc/crates/next-core/src/next_import_map.rs
+++ b/packages/next-swc/crates/next-core/src/next_import_map.rs
@@ -54,6 +54,8 @@ pub async fn get_next_client_import_map(
     )
     .await?;
 
+    insert_optimized_module_aliases(&mut import_map, project_path).await?;
+
     insert_alias_option(
         &mut import_map,
         project_path,
@@ -420,6 +422,8 @@ pub async fn get_next_edge_import_map(
     )
     .await?;
 
+    insert_optimized_module_aliases(&mut import_map, project_path).await?;
+
     insert_alias_option(
         &mut import_map,
         project_path,
@@ -936,8 +940,32 @@ pub fn mdx_import_source_file() -> String {
     format!("{VIRTUAL_PACKAGE_NAME}/mdx-import-source")
 }
 
+// Insert aliases for Next.js stubs of fetch, object-assign, and url
+// Keep in sync with getOptimizedModuleAliases in webpack-config.ts
+async fn insert_optimized_module_aliases(
+    import_map: &mut ImportMap,
+    project_path: Vc<FileSystemPath>,
+) -> Result<()> {
+    insert_exact_alias_map(
+        import_map,
+        project_path,
+        indexmap! {
+            "unfetch" => "next/dist/build/polyfills/fetch/index.js".to_string(),
+            "isomorphic-unfetch" => "next/dist/build/polyfills/fetch/index.js".to_string(),
+            "whatwg-fetch" => "next/dist/build/polyfills/fetch/whatwg-fetch.js".to_string(),
+            "object-assign" => "next/dist/build/polyfills/object-assign.js".to_string(),
+            "object.assign/auto" => "next/dist/build/polyfills/object.assign/auto.js".to_string(),
+            "object.assign/implementation" => "next/dist/build/polyfills/object.assign/implementation.js".to_string(),
+            "object.assign/polyfill" => "next/dist/build/polyfills/object.assign/polyfill.js".to_string(),
+            "object.assign/shim" => "next/dist/build/polyfills/object.assign/shim.js".to_string(),
+            "url" => "next/dist/compiled/native-url".to_string(),
+        },
+    );
+    Ok(())
+}
+
 // Make sure to not add any external requests here.
-pub async fn insert_next_shared_aliases(
+async fn insert_next_shared_aliases(
     import_map: &mut ImportMap,
     project_path: Vc<FileSystemPath>,
     execution_context: Vc<ExecutionContext>,
diff --git a/packages/next/src/build/webpack-config.ts b/packages/next/src/build/webpack-config.ts
index 1664d4377787c..bf6ea0bb5b2a9 100644
--- a/packages/next/src/build/webpack-config.ts
+++ b/packages/next/src/build/webpack-config.ts
@@ -237,29 +237,32 @@ const devtoolRevertWarning = execOnce(
 let loggedSwcDisabled = false
 let loggedIgnoredCompilerOptions = false
 
-function getOptimizedAliases(): { [pkg: string]: string } {
-  const stubWindowFetch = path.join(__dirname, 'polyfills', 'fetch', 'index.js')
-  const stubObjectAssign = path.join(__dirname, 'polyfills', 'object-assign.js')
-
-  const shimAssign = path.join(__dirname, 'polyfills', 'object.assign')
+// Insert aliases for Next.js stubs of fetch, object-assign, and url
+// Keep in sync with insert_optimized_module_aliases in import_map.rs
+function getOptimizedModuleAliases(): { [pkg: string]: string } {
   return {
-    unfetch$: stubWindowFetch,
-    'isomorphic-unfetch$': stubWindowFetch,
-    'whatwg-fetch$': path.join(
-      __dirname,
-      'polyfills',
-      'fetch',
-      'whatwg-fetch.js'
+    unfetch: require.resolve('next/dist/build/polyfills/fetch/index.js'),
+    'isomorphic-unfetch': require.resolve(
+      'next/dist/build/polyfills/fetch/index.js'
+    ),
+    'whatwg-fetch': require.resolve(
+      'next/dist/build/polyfills/fetch/whatwg-fetch.js'
+    ),
+    'object-assign': require.resolve(
+      'next/dist/build/polyfills/object-assign.js'
+    ),
+    'object.assign/auto': require.resolve(
+      'next/dist/build/polyfills/object.assign/auto.js'
+    ),
+    'object.assign/implementation': require.resolve(
+      'next/dist/build/polyfills/object.assign/implementation.js'
+    ),
+    'object.assign/polyfill': require.resolve(
+      'next/dist/build/polyfills/object.assign/polyfill.js'
+    ),
+    'object.assign/shim': require.resolve(
+      'next/dist/build/polyfills/object.assign/shim.js'
     ),
-    'object-assign$': stubObjectAssign,
-    // Stub Package: object.assign
-    'object.assign/auto': path.join(shimAssign, 'auto.js'),
-    'object.assign/implementation': path.join(shimAssign, 'implementation.js'),
-    'object.assign$': path.join(shimAssign, 'index.js'),
-    'object.assign/polyfill': path.join(shimAssign, 'polyfill.js'),
-    'object.assign/shim': path.join(shimAssign, 'shim.js'),
-
-    // Replace: full URL polyfill with platform-based polyfill
     url: require.resolve('next/dist/compiled/native-url'),
   }
 }
@@ -888,7 +891,7 @@ export default async function getBaseWebpackConfig(
       ...(appDir ? { [APP_DIR_ALIAS]: appDir } : {}),
       [ROOT_DIR_ALIAS]: dir,
       [DOT_NEXT_ALIAS]: distDir,
-      ...(isClient || isEdgeServer ? getOptimizedAliases() : {}),
+      ...(isClient || isEdgeServer ? getOptimizedModuleAliases() : {}),
       ...(reactProductionProfiling ? getReactProfilingInProduction() : {}),
 
       // For Node server, we need to re-alias the package imports to prefer to