turbo mode on next.js does not work

[mwawrusch]

Describe the bug

when launching next.js dev with -turbo flag which is the default with monorepos now I receive an warning that webpack is configured, but turbo is not. No builder button appears, and no startup dialog either.

To Reproduce
Steps to reproduce the behavior:

1. Install a new project
2. use turbo
3. nothingness

Expected behavior
The builder config dialog should show up.

[Ipriyankrajai]

Im also getting same error

⚠ Webpack is configured while Turbopack is not, which may cause problems.
⚠ See instructions if you need to configure Turbopack:
https://nextjs.org/docs/app/api-reference/next-config-js/turbo