Poetry Lockfile Hash Mismatch Error in Python Projects
Issue
When running poetry install or poetry update in a Python project, you may encounter an error like:
The lock file does not contain hash for some packages. This can happen when dependencies have changed outside of Poetry.
or
The lock file hash does not match the hash of poetry.lock. You may need to update your lock file.
How can this Poetry lockfile hash mismatch be resolved?
Solution
This error usually occurs when the poetry.lock file is out of sync with pyproject.toml, or if dependencies were changed manually or by another tool. To fix it:
- Run
poetry lock --no-updateto regenerate the lockfile hash without updating dependencies. - If the issue persists, run
poetry lockto fully regenerate the lockfile. - Commit the updated
poetry.lockfile to your repository.
If you are using CI/CD, ensure that both pyproject.toml and poetry.lock are up to date and committed. Avoid editing dependencies manually in the lockfile.