{
  inputs,
  specialArgs,
  user ? "rayandrew",
  ...
}:
let
  mkNixosConfiguration =
    host: system:
    let
      pkgs = import inputs.nixpkgs {
        inherit system;
        config.allowUnfree = true;
        overlays = [
          (import ../overlays {
            inherit inputs;
            inherit 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/${user}/dotfiles";
        home-dir = "/home/${user}";
      };

      modules = [
        inputs.disko.nixosModules.default
        ./shared.nix
        ./${host}
        ./${host}/hardware.nix
        ../nixos
        (
          { 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.${user} = {
                imports = [
                  inputs.nix-index-database.homeModules.nix-index
                  inputs.sops-nix.homeManagerModules.sops
                  ../modules/home-manager
                  ../home
                ]
                ++ lib.optional (builtins.pathExists ./${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 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/${user}/dotfiles";
        home-dir = "/Users/${user}";
      };

      modules = [
        ./shared.nix
        ./${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.${user} = {
                imports = [
                  inputs.nix-index-database.homeModules.nix-index
                  inputs.sops-nix.homeManagerModules.sops
                  inputs.mac-app-util.homeManagerModules.default
                  ../modules/home-manager
                  ../home
                ]
                ++ lib.optional (builtins.pathExists ./${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
        (
          { config, ... }:
          {
            homebrew.taps = builtins.attrNames config.nix-homebrew.taps;
          }
        )
      ];
    };
in
{
  nixosConfigurations = {
    pickwick = mkNixosConfiguration "pickwick" "x86_64-linux";
    lemur = mkNixosConfiguration "lemur" "x86_64-linux";
  };
  darwinConfigurations = {
    dango = mkDarwinConfiguration "dango" "aarch64-darwin";
  };
}