{config, pkgs, ...}: {
  boot.kernelModules = ["nvidia" "nvidia_modeset" "nvidia_uvm" "nvidia_drm"];
  # boot.kernelPackages = lib.mkForce unfreePkgs.linuxKernel.packages.linux_xanmod_latest;
  # boot.kernelParams = ["video=HDMI-A-1:1920x1080"];
  # hardware.graphics= {
  # package = (pkgs.mesa.override { galliumDrivers = [ "i915" "swrast" ]; }).drivers;
  #   enable = true;
  # };

  nix.settings.substituters = [
    "https://cuda-maintainers.chachix.org"
  ];
  nix.settings.trusted-public-keys = [
   "cuda-maintainers.cachix.org-1:0dq3bujKpuEPMCX6U4WylrUDZ9JyUG0VpVZa7CNfq5E="
  ];
  
  services.xserver = {
    videoDrivers = ["nvidia"];
  };
  # environment.systemPackages = with pkgs;[
    # libva-utils
    # nvidia-vaapi-driver
    # pciutils
    # vdpauinfo
    # (blender.override {
    #   cudaSupport = true;
    # })
  # ];
  hardware.nvidia = {
    package = config.boot.kernelPackages.nvidiaPackages.stable;
    modesetting.enable = true;
    powerManagement.enable = false;
    powerManagement.finegrained = false;
    # nvidiaSettings = true;
    open = false;
  };
  # hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.mkDriver {
  #     version = "525.116.04";
  #     sha256_64bit = "sha256-hhDsgkR8/3LLXxizZX7ppjSlFRZiuK2QHrgfTE+2F/4=";
  #     sha256_aarch64 = "sha256-k7k22z5PYZdBVfuYXVcl9SFUMqZmK4qyxoRwlYyRdgU=";
  #     openSha256 = "sha256-dktHCoESqoNfu5M73aY5MQGROlZawZwzBqs3RkOyfoQ=";
  #     settingsSha256 = "sha256-qNjfsT9NGV151EHnG4fgBonVFSKc4yFEVomtXg9uYD4=";
  #     persistencedSha256 = "sha256-ci86XGlno6DbHw6rkVSzBpopaapfJvk0+lHcR4LDq50=";

  #     ibtSupport = true;
  # };
  
}