| title: 'Experimental `appDir: true`' | |
| ## Why This Error Occurred | |
| Your project contains a directory named `app/`. Since Next.js 13, this is a [reserved name](/blog/next-13#new-app-directory-beta). | |
| ## Possible Ways to Fix It | |
| To use the new app directory and its features, please add `appDir: true` to your configuration in `next.config.js` under `experimental`. | |
| ```js filename="next.config.js" | |
| /** @type {import('next').NextConfig} */ | |
| const nextConfig = { | |
| experimental: { | |
| appDir: true, | |
| }, | |
| } | |
| module.exports = nextConfig | |
| ``` | |
| If you do not want to use the new `app/` directory features yet, but have a directory named `app/`, rename the directory to something else. | |
| ## Useful Links | |
| - [Next.js 13 App directory](/blog/next-13#new-app-directory-beta) | |
| - [App directory documentation](/docs/app/getting-started) | |