{
  inputs,
  lib,
  specialArgs,
  user ? "rayandrew",
  ...
}:
let
  mkNixosConfiguration =
    host: system: 
    let
      pkgs = import inputs.nixpkgs {
        inherit system;
        config.allowUnfree = true;
	      overlays = [
          (import ../overlays {
	          inherit inputs;
	          inherit (pkgs) system;
	        })
        ];
      };
      lib = (
        import ../lib.nix {
	        inherit (inputs.nixpkgs) lib;
	        inherit pkgs;
	        inherit (inputs) home-manager;
        }
      );
    in 
      lib.nixosSystem {
        inherit pkgs lib;

        specialArgs = specialArgs // {
          inherit host user;
	        dots = "/home/${user}/dotfiles";
        };

        modules = [
          inputs.disko.nixosModules.default
          ./${host}
          ./${host}/hardware.nix
          ../nixos
          ../overlays
          ({config, ...}: {
            home-manager = {
              useGlobalPkgs = true;
              useUserPackages = true;

              extraSpecialArgs = specialArgs // {
                inherit host user system;
                system-font = "Consolas";
	              dots = "/home/${user}/dotfiles";
                home-dir = config.home-manager.users.${user}.home.homeDirectory;
              };

              users.${user} = {
                imports = [
                  inputs.nix-index-database.hmModules.nix-index
                  inputs.sops-nix.homeManagerModules.sops
                  ../home
                ] ++ lib.optional(builtins.pathExists ./${host}/home.nix) ./${host}/home.nix;
              };
            };
          })
          # alias for home-manager
          (lib.mkAliasOptionModule [ "hm" ] [
            "home-manager"
            "users"
            user
          ])
          inputs.home-manager.nixosModules.home-manager
          inputs.sops-nix.nixosModules.sops
        ];
      };

  mkDarwinConfiguration =
    host: system: 
    let
      pkgs = import inputs.nixpkgs {
        inherit system;
        config.allowUnfree = true;
	      overlays = [
          (import ../overlays {
	          inherit inputs;
	          inherit (pkgs) system;
	        })
          inputs.nixpkgs-firefox-darwin.overlay
        ];
      };
      lib = (
        import ../lib.nix {
	        inherit (inputs.nixpkgs) lib;
	        inherit pkgs;
	        inherit (inputs) home-manager;
        }
      );
    in 
      inputs.nix-darwin.lib.darwinSystem {
        inherit pkgs lib;

        specialArgs = specialArgs // {
          inherit host user;
	        dots = "/Users/${user}/dotfiles";
        };

        modules = [
          ./${host}
          ../darwin
          ({config, ...}: {
            home-manager = {
              useGlobalPkgs = true;
              useUserPackages = true;

              extraSpecialArgs = specialArgs // {
                inherit host user system;
                system-font = "SF Mono";
                home-dir = config.home-manager.users.${user}.home.homeDirectory;
	              dots = "/Users/${user}/dotfiles";
              };

              users.${user} = {
                imports = [
                  inputs.nix-index-database.hmModules.nix-index
                  inputs.sops-nix.homeManagerModules.sops
		              inputs.mac-app-util.homeManagerModules.default
                  ../home
                ] ++ lib.optional(builtins.pathExists ./${host}/home.nix) ./${host}/home.nix;
              };
            };
          })
          # alias for home-manager
          (lib.mkAliasOptionModule [ "hm" ] [
            "home-manager"
            "users"
            user
          ])
          inputs.home-manager.darwinModules.home-manager
	        inputs.mac-app-util.darwinModules.default
          inputs.nix-homebrew.darwinModules.nix-homebrew
        ];
      };
in
{
  nixosConfigurations = {
    pickwick = mkNixosConfiguration "pickwick" "x86_64-linux";
    lemur    = mkNixosConfiguration "lemur" "x86_64-linux";
  };
  darwinConfigurations = {
    dango = mkDarwinConfiguration "dango" "aarch64-darwin";
  };
}