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Pyproject.nix is a collection of Nix utilities to work with Python project metadata in Nix. It mainly targets PEP-621 compliant pyproject.toml files and data formats, but also implement support for other & legacy formats such as Poetry & requirements.txt. Pyproject.nix aims to be a swiss army knife of simple customi...

I’ve written a lot about the Nix build system over the past decade, but one complaint I keep coming across is that Nix requires dependency constraints to be “solved manually”. This is a sort of category-error: sure, it’s true that Nix doesn’t “solve dependency constraints”; in the same way that, say, /usr/bin/env do...