{
  config,
  inputs,
  lib,
  perSystem,
  pkgs,
  ...
}: let
  inherit (lib) mkIf mkEnableOption;
  cfg = config.desktop.niri;
in {
  options = {
    desktop.niri.enable =
      mkEnableOption "enable niri desktop";
  };
  config = lib.mkMerge [
    (mkIf cfg.enable {
      module.desktop.displayManager = "greetd";
      module.gnome-keyring.enable = true;
      module.pipewire.enable = true;

      # nixpkgs.overlays = [inputs.niri.overlays.default];

      programs.niri.enable = true; # wayland compositor in rust
      programs.niri.package = perSystem.niri-flake.niri-unstable;

      environment.variables = {
        NIXOS_OZONE_WL = "1";
      };
      security = {
        pam.services.gtklock = {};
        soteria.enable = true; # polkit agent in rust
      };
      services = {
        blueman.enable = config.hardware.bluetooth.enable;
        gvfs.enable = true;
      };
      xdg.portal = {
        enable = true;
        extraPortals = with pkgs; [xdg-desktop-portal-gnome xdg-desktop-portal-gtk];
        config.niri.default = ["gnome" "gtk"];
      };
    })
    (mkIf (cfg.enable
      && config.services.displayManager.autoLogin.enable) {
      services.greetd.settings.initial_session = {
        command = "niri-session";
        user = config.services.displayManager.autoLogin.user;
      };
    })
  ];
}