pixi failing as of 2025-10-08

[ipmb]

https://github.com/lincolnloop/python-package-manager-shootout/actions/runs/18354972451/job/52284525963

@jacobj45 any ideas what's happening here?

[ipmb]

Tried something in #35, but it's not working. Pulling pixi from the benchmark until somebody with more experience can resolve the issue.