broken build with next 16

[parmentelat]

quick question: is codehike expected to work under next 16 ?

I have a repo here
https://github.com/ue22-p25/backend-flask-chatapp

which broke when I accepted gh's dependabot PR here
ue22-p25/backend-flask-chatapp#7

complaining with the error below

I'm not exactly fluent with next, and I don't explicitly configure turbo in my own config

I have reverted to next15 for now, how am supposed to upgrade ?

---

❯ npx next build
⚠ Invalid next.config.mjs options detected:
⚠     Unrecognized key(s) in object: 'turbo' at "experimental"
⚠ See more info here: https://nextjs.org/docs/messages/invalid-next-config
▲ Next.js 16.1.6 (Turbopack)
- Experiments (use with caution):
  ? turbo (invalid experimental key)

  Creating an optimized production build ...

-----
FATAL: An unexpected Turbopack error occurred. A panic log has been written to /var/folders/9n/sxs31qhj1gnd6gk2v0ns8848000fn2/T/next-panic-646da144b5b42a888fed36a72a1391c5.log.

To help make Turbopack better, report this error by clicking here.
-----


> Build error occurred
Error [TurbopackInternalError]: Failed to write app endpoint /page

Caused by:
- Expected process result to be a module, but it could not be processed

Debug info:
- Execution of get_all_written_entrypoints_with_issues_operation failed
- Execution of EntrypointsOperation::new failed
- Execution of all_entrypoints_write_to_disk_operation failed
- Execution of Project::emit_all_output_assets failed
- Execution of *emit_assets failed
- Execution of all_assets_from_entries_operation failed
- Execution of *all_assets_from_entries failed
- Execution of output_assets_operation failed
- Execution of <AppEndpoint as Endpoint>::output failed
- Failed to write app endpoint /page
- Execution of AppEndpoint::output failed
- Execution of get_app_page_entry failed
- Execution of ProcessResult::module failed
- Expected process result to be a module, but it could not be processed
    at <unknown> (TurbopackInternalError: Failed to write app endpoint /page) {
  type: 'TurbopackInternalError',
  location: undefined
}