Turbopack Error: Next.js package not found

[quangnguyentan]

Turbopack version: 91e5b6b8
Next.js version: 0.0.0

Error message:

Next.js package not found

Debug info:
- 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
- Next.js package not found

[grilomatheus]

This usually happens if Turbopack can’t locate next in your node_modules. A few things to check:

1. Make sure next is installed in your project:

npm install next react react-dom
# or
yarn add next react react-dom

2. Delete .next/ and node_modules/, then reinstall:

rm -rf .next node_modules
npm install

3. Confirm you’re running the command in the project root (where package.json is).

If you still hit the error, it might be tied to the current Turbopack snapshot you’re using. In that case, try running with Webpack temporarily:

next dev

(without --turbopack) until a fix lands.

[icyJoseph]

Hi,

We have added some more checks for this error, which print warnings when multiple lock files are found.

Refer to this comment for instructions on how to fix it: #78192 (comment)