`jlpm build` does not work for `jupyterlab`

### Description

Running `jlpm build` fails with the error: `Internal Error: jupyterlab-optuna@workspace:.: This package doesn't seem to be present in your lockfile; run "yarn install" to update the lockfile`.
See [this comment](https://github.com/optuna/optuna-dashboard/pull/969#pullrequestreview-2552121398) in #969  for detail.
