{ config, lib, pkgs, jovian, ... }:
{
  imports = [ jovian.nixosModules.jovian ];

  options.system.steamdeck.enable = lib.mkEnableOption "Jovian NixOS environment";

  config = lib.mkIf config.system.steamdeck.enable {
    jovian = {
      steam = {
        enable = true;
        autoStart = true;
        desktopSession = "gnome";
        user = config.sysusers.main;
      };
      decky-loader = {
        enable = true;
        package = pkgs.decky-loader-prerelease;
      };
      devices.steamdeck = {
        enable = true;
        enableGyroDsuService = true;
      };
    };

    boot.kernelPackages = lib.mkForce pkgs.linuxPackages_jovian;

    programs.steam = {
      extest.enable = true;
      extraCompatPackages = with pkgs; [ proton-ge-bin ];
      localNetworkGameTransfers.openFirewall = true;
      remotePlay.openFirewall = true;
    };

    services = {
      displayManager.ly.enable = lib.mkForce false;
      keyd.enable = lib.mkForce false;
      tlp.enable = lib.mkForce false;
      xserver.desktopManager.gnome.enable = true;
    };

    networking = {
      networkmanager.enable = true;
      wireless.enable = lib.mkForce false;
    };

    environment = {
      persistence."/persist" = {
        directories = [
          "/etc/NetworkManager/system-connections"
          "/var/lib/decky-loader"
        ];
        users.${config.sysusers.main}.directories = [
          ".local/share/gnome-settings-daemon"
          ".local/share/gnome-shell"
          ".steam"
        ];
      };
      gnome.excludePackages = with pkgs; [
        adwaita-icon-theme
        baobab
        epiphany
        evince
        file-roller
        geary
        gnome-calculator
        gnome-calendar
        gnome-characters
        gnome-clocks
        gnome-color-manager
        gnome-connections
        gnome-console
        gnome-contacts
        gnome-disk-utility
        gnome-font-viewer
        gnome-logs
        gnome-maps
        gnome-music
        gnome-shell-extensions
        gnome-software
        gnome-system-monitor
        gnome-text-editor
        gnome-tour
        gnome-user-docs
        gnome-weather
        loupe
        nautilus
        orca
        seahorse
        simple-scan
        snapshot
        sushi
        sysprof
        totem
        yelp
      ];
    };

    nixpkgs.allowUnfreePackages = [
      "steam"
      "steam-jupiter-unwrapped"
      "steamdeck-firmware"
      "steamdeck-hw-theme"
    ];

    specialisation.desktop.configuration.config.system.steamdeck.enable = lib.mkForce false;
  };
}