{
  den.aspects.nix-alien = {
    nixos = {
      environment.systemPackages = let
        nix-alien = import (
          builtins.fetchTarball "https://github.com/thiagokokada/nix-alien/tarball/master"
        ) { };
      in [
        nix-alien.nix-alien
      ];
    };
  };
}