diff --git a/examples/sandbox/package.json b/examples/sandbox/package.json
index ec0ce5d0..e655c332 100644
--- a/examples/sandbox/package.json
+++ b/examples/sandbox/package.json
@@ -5,8 +5,8 @@
     "license": "MIT",
     "type": "module",
     "scripts": {
-        "dev": "vite --port 3000",
-        "dev:ext": "cross-env EXT=true pnpm dev",
+        "dev": "vite",
+        "dev:ext": "pnpm dev -- --ext",
         "build": "vite build",
         "preview": "vite preview"
     },
diff --git a/examples/sandbox/vite.config.ts b/examples/sandbox/vite.config.ts
index e08ea114..ab449ca3 100644
--- a/examples/sandbox/vite.config.ts
+++ b/examples/sandbox/vite.config.ts
@@ -2,12 +2,13 @@ import devtools from 'solid-devtools/vite'
 import {defineConfig} from 'vite'
 import solid from 'vite-plugin-solid'
 
-const is_ext = process.env['EXT'] === 'true' || process.env['EXT'] === '1'
+const is_ext = process.argv.includes('--ext')
 
 export default defineConfig(mode => {
     const is_build = mode.command === 'build'
 
     return {
+        server: {port: 3000},
         plugins: [
             devtools({
                 autoname: true,