5 files changed, 50 insertions, 4 deletions
diff --git a/packages/astro/src/runtime.ts b/packages/astro/src/runtime.ts
index 53a5fa8bb..a12f5d4fe 100644
--- a/packages/astro/src/runtime.ts
+++ b/packages/astro/src/runtime.ts
@@ -418,12 +418,14 @@ async function createSnowpack(astroConfig: AstroConfig, options: CreateSnowpackO
     packageOptions: {
       knownEntrypoints,
       external,
-    },
-    alias: {
-      ...Object.fromEntries(nodeBuiltinsMap),
-    },
+    }
   });
 
+  const polyfillNode = (snowpackConfig.packageOptions as any).polyfillNode as boolean;
+  if(!polyfillNode) {
+    snowpackConfig.alias = Object.fromEntries(nodeBuiltinsMap);
+  }
+
   snowpack = await startSnowpackServer(
     {
       config: snowpackConfig,
diff --git a/packages/astro/test/builtins-polyfillnode.test.js b/packages/astro/test/builtins-polyfillnode.test.js
new file mode 100644
index 000000000..8fef5e8e9
--- /dev/null
+++ b/packages/astro/test/builtins-polyfillnode.test.js
@@ -0,0 +1,19 @@
+import { suite } from 'uvu';
+import * as assert from 'uvu/assert';
+import { doc } from './test-utils.js';
+import { setup } from './helpers.js';
+
+const Builtins = suite('Node builtins with polyfillNode option');
+
+setup(Builtins, './fixtures/builtins-polyfillnode');
+
+Builtins('Doesnt alias to node: prefix', async ({ runtime }) => {
+  const result = await runtime.load('/');
+  if (result.error) throw new Error(result.error);
+
+  const $ = doc(result.contents);
+
+  assert.match($('#url').text(), new RegExp('unicorn.jpg'));
+});
+
+Builtins.run();
diff --git a/packages/astro/test/fixtures/builtins-polyfillnode/package.json b/packages/astro/test/fixtures/builtins-polyfillnode/package.json
new file mode 100644
index 000000000..1c1382619
--- /dev/null
+++ b/packages/astro/test/fixtures/builtins-polyfillnode/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "@astrojs/astro-test-builtins-polyfillnode",
+  "version": "1.2.0",
+  "dependencies": {
+    "file-url": "4.0.0"
+  }
+}
+\ No newline at end of file
diff --git a/packages/astro/test/fixtures/builtins-polyfillnode/snowpack.config.json b/packages/astro/test/fixtures/builtins-polyfillnode/snowpack.config.json
new file mode 100644
index 000000000..3c503c831
--- /dev/null
+++ b/packages/astro/test/fixtures/builtins-polyfillnode/snowpack.config.json
@@ -0,0 +1,6 @@
+{
+  "workspaceRoot": "../../../../../",
+  "packageOptions": {
+    "polyfillNode": false 
+  }
+}
diff --git a/packages/astro/test/fixtures/builtins-polyfillnode/src/pages/index.astro b/packages/astro/test/fixtures/builtins-polyfillnode/src/pages/index.astro
new file mode 100644
index 000000000..8286f1ed1
--- /dev/null
+++ b/packages/astro/test/fixtures/builtins-polyfillnode/src/pages/index.astro
@@ -0,0 +1,12 @@
+---
+import fileUrl from 'file-url';
+
+const r = fileUrl('unicorn.jpg');
+---
+
+<html>
+<head><title>Testing</title></head>
+<body>
+  <div id="url">{r}</div>
+</body>
+</html>
+\ No newline at end of file