Mach-nix alternatives

[TyberiusPrime]

With mach-nix being no longer maintained (and me not picking up this puppy),
and dream2nix not being ready for prime time (I believe),
Let's gather some alternatives for the casual visitors of this issue tracker.

To my mind mach-nix did two things:

1. 'solve python package versions' giving requirements + a date (or a pypi-debs-db version)
2. turn those python package versions into nix derivations.

My understanding of dream2nix is that it's essentially 'lockfile-to-nix', so it will cover 2.
For now, 2 is being covered nicely by poetry2nix.

For 1, I've hacked up ancient-poetry,
which will produce a poetry lock-file with no packages newer than a given date.
I think it complements poetry2nix rather nicely for my use cases.

[yihuang]

I figured out sth: https://gist.github.com/yihuang/b2665a2dd6c3fbaf8fa6024f9591b941

[TyberiusPrime]

Good job on showing how to turn requirements.txt into poetry.

Please note that ancient-poetry now also supports uv, and therefore the new and coming uv2nix.

[yihuang]

Good job on showing how to turn requirements.txt into poetry.

Please note that ancient-poetry now also supports uv, and therefore the new and coming uv2nix.

wasn't aware of uv2nix, if it doesn't require manual overrides like poetry2nix, it'll be awesome.

[TyberiusPrime]

It will still require overrides (at least until uv starts putting build-dependencies into it's lockfile), and uv2nix will not become an override collection.

I'm preparing such an override collection though: https://github.com/TyberiusPrime/uv2nix_hammer_overrides/
together with a semi automatic tool to find the overrides.