dotfiles/nixos/gfx-nvidia-optimus.nix

{ config, pkgs, ... }:
let
  nvidia-offload = pkgs.writeShellScriptBin "nvidia-offload" ''
    export __NV_PRIME_RENDER_OFFLOAD=1
    export __NV_PRIME_RENDER_OFFLOAD_PROVIDER=NVIDIA-G0
    export __GLX_VENDOR_LIBRARY_NAME=nvidia
    export __VK_LAYER_NV_optimus=NVIDIA_only
    exec -a "$0" "$@"
  '';
in
  {
    environment.systemPackages = [ nvidia-offload ];

    services.xserver.videoDrivers = [ "nvidia" ];
    hardware.opengl = { enable = true; };

    hardware.nvidia.modesetting.enable = true;
    hardware.nvidia.prime.offload.enable = true;
    hardware.nvidia.prime = {
      intelBusId = "PCI:0:2:0";
      nvidiaBusId = "PCI:1:0:0";
    };
  }