Turbopack Error: Next.js package not found

[thegdsks]

Bug Report: Turbopack Crash – Next.js package not found

Environment

• Turbopack Version: v15.3.5
• Next.js Version: ^15.1.3
• Node.js Version: v24.3.0
• Operating System: macOS 14.4.1_
• Package Manager: [email protected]

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Error Summary

Next.js package not found

🔍 Debug Trace

- 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

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Steps to Reproduce

1. Create a new Next.js app using next@^15.1.3
2. Run the development server with yarn dev
3. Observe the Turbopack fatal crash with the trace shown above

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Troubleshooting Attempts

• Verified next is in package.json and installed via yarn install
• Removed node_modules, .next, and lockfiles for a clean reinstall
• Ensured project includes an app/ or pages/ directory
• Disabled Turbopack via next.config.js:

// next.config.js
module.exports = {
  experimental: {
    turbo: false
  }
}

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Panic log was written to:
/var/folders/q1/lxypk7fd4f17l9pcrw323nym0000gn/T/next-panic-471c638e4ca735b704527954737cc19e.log

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Additional Context

Let me know if you'd like me to attach or analyze the panic log for further debugging. Happy to provide more info or reproduce in a minimal repo.