Downgrade of cffi fails

[loleg]

On a fresh installation of Poetry 2.1.1 (this was also a problem on 2.0.1), installing the export plugin tries to downgrade cffi which is problematic due to compatibility issues with Python 3.13.

In my console:

$ poetry self add poetry-plugin-export
Using version ^1.9.0 for poetry-plugin-export

Updating dependencies
Resolving dependencies... (0.4s)

Package operations: 1 install, 18 updates, 0 removals

  - Downgrading cffi (1.17.1 -> 1.16.0): Failed

PEP517 build of a dependency failed

[dimbleby]

duplicate https://github.com/python-poetry/poetry/issues/9841, please close

tldr I recommend never using poetry self

[loleg]

I'm on Linux and not Windows, and if I do poetry self update it's the same problem, so I am closing this issue.

Thanks for the tip: perhaps the installation docs should warn against this too.