next dev --turbo error when using bun.lock text lockfile

[matallui]

Link to the code that reproduces this issue

https://github.com/matallui/bug-next-bun-text-lockfile

To Reproduce

1. Create a new turborepo monorepo with bun create turbo@latest
2. Delete bun.lockb lockfile
3. Run bun i --save-text-lockfile in the root of the monorepo
4. cd into apps/web and run bun run dev

OR

1. Clone repo above
2. Install dependencies with bun i
3. cd apps/web && bun run dev

Current vs. Expected behavior

Expected

Next dev server to start and be accessible on localhost:3000

Current

   ▲ Next.js 15.1.1 (Turbopack)
   - Local:        http://localhost:3000
   - Network:      http://127.0.2.2:3000
   - Environments: .env

 ✓ Starting...
FATAL: An unexpected Turbopack error occurred. Please report the content of /var/folders/ks/8zn35t35521c9xvbtl9xt_7c0000gn/T/next-panic-18ab5faad2f00c774e96d73fa060eb8.log, along with a description of what you were doing when the error occurred, to https://github.com/vercel/next.js/issues/new
[Error [TurbopackInternalError]: Next.js package not found

Debug info:
- Execution of get_entrypoints_with_issues 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 *FileSystemPath::join failed
- Execution of get_next_package failed
- Next.js package not found]

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 24.2.0: Fri Dec  6 19:02:41 PST 2024; root:xnu-11215.61.5~2/RELEASE_ARM64_T6030
  Available memory (MB): 18432
  Available CPU cores: 11
Binaries:
  Node: 20.18.1
  npm: 10.8.2
  Yarn: 1.22.22
  pnpm: 9.15.0
Relevant Packages:
  next: 15.1.1
  eslint-config-next: 15.1.1
  react: 18.3.1
  react-dom: 18.3.1
  typescript: 5.7.2
Next.js Config:
  output: N/A

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

Turbopack

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

next dev (local)

### Additional context

- If I run `next dev` without using Turbopack, it all seems to work fine
- Bun's text lockfile (bun.lock) was introduced a day or two ago with bun v1.1.39

[RiskyMH]

i believe i fixed this in #74056 (basically next.js is looking for "root" dir using package manager lock files)

a simple workarround is make empty bun.lockb file or one of the many other options