{...}: {
  # Intel integrated GPU (mesa + VA-API hardware video acceleration).
  flake.nixosModules.gpuIntel = {pkgs, ...}: {
    environment.systemPackages = with pkgs; [
      mesa
      vulkan-tools
    ];
    hardware.graphics = {
      enable = true;
      enable32Bit = true;
      extraPackages = with pkgs; [
        intel-media-driver # modern iHD driver (Broadwell+)
        intel-vaapi-driver # legacy i965 driver
        libva-vdpau-driver
      ];
    };
  };
}