Guix package in Nix

[Leo Famulari]

The Guix package in Nix [0] is still on version 0.3 and it is failing to
build from source.

Does anybody want to take it over?

>From #guix:
<domenkozar> anyone that wants to maintain guix in nixpkgs?
<lfam> domenkozar: I see the Nix package is very out of date. I do see
that it shares the Nix store.
<domenkozar> lfam: yeah and it's failing to compile

[0]
https://github.com/NixOS/nixpkgs/blob/master/pkgs/tools/package-management/guix/default.nix