{ pkgs, ... }: {
  # Enable sound with pipewire.
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
  };

  # Configure keymap in X11
  services.xserver = {
    enable = true;
    xkb.layout = "us";
    xkb.variant = "";
    autorun = true;
  };

  ##### disable nvidia, very nice battery life.
  # hardware.nvidiaOptimus.disable = lib.mkDefault true;

  services.xserver = {
    displayManager = {
      gdm = {
        enable = true;
      };
    };
    desktopManager = {
      gnome = { 
        enable = true;
        extraGSettingsOverridePackages = [ pkgs.mutter ];
        extraGSettingsOverrides = ''
          [org.gnome.mutter]
          experimental-features=['scale-monitor-framebuffer', 'variable-refresh-rate']
        '';
      };
    };
  };

  # Set Gnome settings:
  services.gnome = {
    games.enable = false; 
    core-utilities.enable = true;
    gnome-remote-desktop.enable = true;
  };

  # Set the firewall ports for gnome-remote-desktop:
  networking.firewall.interfaces.tailscale0.allowedTCPPorts = [ 3389 ];


  # https://nixos.wiki/wiki/GNOME
  # Remove unwanted packages
  environment.gnome.excludePackages = (with pkgs; [
    cheese
    gnome-music
    epiphany
    geary
    totem
    gnome-characters
    gnome-tour
    gnome-photos
    yelp
    gnome-font-viewer
    gnome-connections
    gnome-contacts
    gnome-logs
    gnome-maps
    simple-scan
  ]);

  environment.systemPackages = with pkgs; [
    # Gnome Extensions
    gnomeExtensions.arcmenu
    gnomeExtensions.tiling-shell
    gnomeExtensions.dash-to-panel
    gnomeExtensions.blur-my-shell
    gnomeExtensions.caffeine
    gnomeExtensions.hibernate-status-button
    gnomeExtensions.night-theme-switcher
    gnomeExtensions.tailscale-qs
    gnomeExtensions.battery-usage-wattmeter
    gnomeExtensions.lilypad

    gnome-podcasts

    # Gnome relevant packages
    gnome-tweaks
    papirus-icon-theme
    dconf2nix # https://github.com/gvolpe/dconf2nix
    ghostty # Terminal Emulator
    gnome-session
  ];
}