nixos/flake.nix

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-21.05";
    nixos-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
    home-manager = {
      url = "github:rycee/home-manager/release-21.05";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = inputs@{ self, nixpkgs, nixos-unstable, home-manager }:
    let
      system = "x86_64-linux";

      pkgs = import nixpkgs {
        inherit system;
        config.allowUnfree = true;
        overlays = [ (final: prev: { inherit unstable; }) ];
      };

      unstable = import nixos-unstable {
        inherit system;
        config.allowUnfree = true;
      };

      utils = import ./lib {
        inherit pkgs unstable nixpkgs nixos-unstable home-manager;
      };

      inherit (utils) host;
      inherit (utils) user;
    in {
      nixosConfigurations = {
        architect = host.mkHost {
          name = "architect";
          users = [{
            user = "giulio";
            roles = [ "git" ];
          }];
        };
        gAluminum = host.mkHost {
          name = "gAluminum";
          users = [{
            user = "giulio";
            roles = [ "desktop" "ssh" "git" ];
          }];
          roles = [ "gnome" ];
        };
        proxy = host.mkHost {
          name = "proxy";
          users = [ ];
        };
      };
    };
}