Using uv2nix with older nixpkgs versions

uv2nix supports nixpkgs >=22.11, but requires additional manual overrides for nixpkgs <=24.11.

The pyproject.nix build hooks require a more recent version of uv(>=0.5.7) on older channels, which needs to be added via a nixpkgs overlay like:

import nixpkgs {
    overlays = [
      (final: prev: {
        uv = inputs.uv2nix.packages.${system}.uv-bin;
      })
    ];
}