{ config, pkgs, ... }:
{
  services.xserver.videoDrivers = [ "nvidia" ];

  hardware = {
    graphics = {
      enable = true;
      enable32Bit = true;
    };

    nvidia = {
      modesetting.enable = true;
      open = false;
      nvidiaSettings = true;

      powerManagement = {
        enable = true;
        finegrained = false;
      };

#       package = config.boot.kernelPackages.nvidiaPackages.vulkan_beta;

      package = let
        rcu_patch = pkgs.fetchpatch {
          url = "https://github.com/gentoo/gentoo/raw/c64caf53/x11-drivers/nvidia-drivers/files/nvidia-drivers-470.223.02-gpl-pfn_valid.patch";
          hash = "sha256-eZiQQp2S/asE7MfGvfe6dA/kdCvek9SYa/FFGp24dVg=";
        };
      in config.boot.kernelPackages.nvidiaPackages.mkDriver {
        version = "550.40.07";
        sha256_64bit = "sha256-KYk2xye37v7ZW7h+uNJM/u8fNf7KyGTZjiaU03dJpK0=";
        sha256_aarch64 = "sha256-AV7KgRXYaQGBFl7zuRcfnTGr8rS5n13nGUIe3mJTXb4=";
        openSha256 = "sha256-mRUTEWVsbjq+psVe+kAT6MjyZuLkG2yRDxCMvDJRL1I=";
        settingsSha256 = "sha256-c30AQa4g4a1EHmaEu1yc05oqY01y+IusbBuq+P6rMCs=";
        persistencedSha256 = "sha256-11tLSY8uUIl4X/roNnxf5yS2PQvHvoNjnd2CB67e870=";

        patches = [ rcu_patch ];
      };
    };
  };
}