Turbopack Error: Next.js package not found

[raoultransvie]

yarn dev
▲ Next.js 15.3.0 (Turbopack)

• Local: http://localhost:3000
• Network: http://145.239.11.24:3000

✓ Starting...

---

FATAL: An unexpected Turbopack error occurred. A panic log has been written to /tmp/next-panic-82c7942b630d792e17ebc091b8f76c02.log.

To help make Turbopack better, report this error by clicking here: https://github.com/vercel/next.js/discussions/new?category=turbopack-error-report&title=Turbopack%20Error%3A%20Next.js%20package%20not%20found&body=Turbopack%20version%3A%20%60664110c1%60%0A%0AError%20message%3A%0A%60%60%60%0ATurbopack%20Error%3A%20Next.js%20package%20not%20found%0A%60%60%60&labels=Turbopack,Turbopack%20Panic%20Backtrace

[Error [TurbopackInternalError]: Next.js package not found

Debug info:

• Execution of get_entrypoints_with_issues_operation failed
• Execution of EntrypointsOperation::new failed
• Execution of Project::entrypoints failed
• Execution of AppProject::routes failed
• Execution of directory_tree_to_entrypoints_internal failed
• Execution of directory_tree_to_loader_tree failed
• Execution of get_next_package failed
• Next.js package not found]

[wbinnssmith]

Thanks for the report! This error usually happens when Turbopack determined your project’s root directory based on a lockfile that exists further down the filesystem than where next is installed.

For example, something like this:

repo/
  package.json
  package-lock.json
  node_modules/next
  apps/
    my-app/
      package.json
      package-lock.json
      app/
        page.tsx

Here, Turbopack determined the root directory to be my-app, but Next.js is installed further up the tree.

You’ll need to either:

• Remove the lockfile inside my-app if possible, or
• Set turbopack.root in to next.config.js to your repository’s root directory (or wherever Next.js is installed), as described here

We’re working on a better way of communicating this problem, and exploring other approaches where the root directory can be better discovered automatically.