next package can't be found when using --turbo and deno 2 rc in a monorepo

vercel / next.js

The React Framework

MIT License

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Link to the code that reproduces this issue

https://github.com/hamlim/deno-monorepo

To Reproduce

Clone the repo
Upgrade to deno 2 release candidate: deno upgrade rc (using at least 2.0.0-rc.7)
Run deno install to install dependencies
Run deno task dev --filter=docs (runs the docs Next app in development mode)
Try to visit localhost:3000
See error in terminal

Current vs. Expected behavior

Following the above steps - I'd expect the app to boot correctly, however it instead shows the following error in the terminal:

docs:dev: $ next dev --turbo
docs:dev:   ▲ Next.js 15.0.0-canary.140 (turbo)
docs:dev:   - Local:        http://localhost:3000
docs:dev:
docs:dev:  ✓ Starting...
docs:dev: [Error: Next.js package not found
docs:dev:
docs:dev: Debug info:
docs:dev: - Execution of get_entrypoints_with_issues failed
docs:dev: - Execution of Project::entrypoints failed
docs:dev: - Execution of PagesProject::to_endpoint failed
docs:dev: - Execution of PagesStructureItem::new failed
docs:dev: - Execution of FileSystemPath::join failed
docs:dev: - Execution of get_next_package failed
docs:dev: - Next.js package not found] {
docs:dev:   code: 'GenericFailure'
docs:dev: }

Note:

Removing --turbo on the dev task within apps/docs/package.json makes it work as expected.

My assumption is that turbopack (maybe) is unable to resolve the symlinked next package from the root node_modules (next is installed somewhere else with deno and then symlinked I think)

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: 24.0.0
  Available memory (MB): 24576
  Available CPU cores: 8
Binaries:
  Node: 20.11.1
  npm: 10.8.2
  Yarn: N/A
  pnpm: N/A
Relevant Packages:
  next: 15.0.0-canary.140 // There is a newer canary version (15.0.0-canary.173) available, please upgrade!
  eslint-config-next: N/A
  react: 19.0.0-rc-7771d3a7-20240827
  react-dom: 19.0.0-rc-7771d3a7-20240827
  typescript: 5.4.5
Next.js Config:
  output: N/A
 ⚠ There is a newer canary version (15.0.0-canary.173) available, please upgrade!
   Please try the latest canary version (`npm install next@canary`) to confirm the issue still exists before creating a new issue.
   Read more - https://nextjs.org/docs/messages/opening-an-issue

Which area(s) are affected? (Select all that apply)

Module Resolution, Turbopack

Which stage(s) are affected? (Select all that apply)

next dev (local)

Additional context

Will attempt to replicate with the latest canary!

docs:dev: $ next dev --turbo docs:dev: ▲ Next.js 15.0.0-canary.173 (turbo) docs:dev: - Local: http://localhost:3000 docs:dev: docs:dev: ✓ Starting... docs:dev: ✓ Ready in 2.8s docs:dev: ✓ Compiled / in 4ms docs:dev: ✓ Compiled /_error in 0ms docs:dev: ⨯ [Error: Next.js package not found docs:dev: docs:dev: Debug info: docs:dev: - Execution of *get_written_endpoint_with_issues failed docs:dev: - Execution of *PagesProject::to_endpoint failed docs:dev: - Execution of *PagesStructureItem::new failed docs:dev: - Execution of *FileSystemPath::join failed docs:dev: - Execution of get_next_package failed docs:dev: - Next.js package not found] { docs:dev: name: 'TurbopackInternalError' docs:dev: } docs:dev: [Error: Failed to write app endpoint /page docs:dev: docs:dev: Caused by: docs:dev: - Next.js package not found docs:dev: docs:dev: Debug info: docs:dev: - Execution of get_written_endpoint_with_issues failed docs:dev: - Execution of <AppEndpoint as Endpoint>::write_to_disk failed docs:dev: - Failed to write app endpoint /page docs:dev: - Execution of AppEndpoint::output failed docs:dev: - Execution of *get_app_page_entry failed docs:dev: - Execution of *ModuleAssetContext::new failed docs:dev: - Execution of get_server_module_options_context failed docs:dev: - Execution of get_transpiled_packages failed docs:dev: - Execution of *FileSystem::read failed docs:dev: - Execution of *FileSystemPath::fs failed docs:dev: - Execution of *FileSystemPath::join failed docs:dev: - Execution of get_next_package failed docs:dev: - Next.js package not found] { docs:dev: name: 'TurbopackInternalError' docs:dev: } docs:dev: ⨯ [Error: Next.js package not found docs:dev: docs:dev: Debug info: docs:dev: - Execution of *get_written_endpoint_with_issues failed docs:dev: - Execution of *PagesProject::to_endpoint failed docs:dev: - Execution of *PagesStructureItem::new failed docs:dev: - Execution of *FileSystemPath::join failed docs:dev: - Execution of get_next_package failed docs:dev: - Next.js package not found] { docs:dev: name: 'TurbopackInternalError' docs:dev: } docs:dev: [Error: Next.js package not found docs:dev: docs:dev: Debug info: docs:dev: - Execution of *get_written_endpoint_with_issues failed docs:dev: - Execution of *PagesProject::to_endpoint failed docs:dev: - Execution of *PagesStructureItem::new failed docs:dev: - Execution of *FileSystemPath::join failed docs:dev: - Execution of get_next_package failed docs:dev: - Next.js package not found] { docs:dev: name: 'TurbopackInternalError' docs:dev: } docs:dev: ✓ Compiled /favicon.ico in 0ms

vercel / next.js