nixos-configuration/modules/intel-graphics.nix

{
  config,
  pkgs,
  ...
}: {
  config = {
    hardware.opengl = {
      extraPackages = with pkgs; [
        intel-media-driver
        vaapiIntel
        vaapiVdpau
        libvdpau-va-gl
        intel-ocl
      ];
      extraPackages32 = with pkgs.pkgsi686Linux; [
        intel-media-driver
        vaapiIntel
        vaapiVdpau
        libvdpau-va-gl
      ];
    };
    environment.systemPackages = with pkgs; [
      nvtopPackages.intel
    ];
    allowedUnfreePackages = ["intel-ocl"];
  };
}