Snippet with NVIDIA Prime on NixOS

nvidia.nix

# Services (X)

services = {
    tlp = {
      enable = true;
      settings = {
        CPU_SCALING_GOVERNOR_ON_BAT = "powersave";
        CPU_SCALING_GOVERNOR_ON_AC = "performance";
        CPU_MAX_PERF_ON_AC = 100;
        CPU_MAX_PERF_ON_BAT = 90;
      };
    };
    earlyoom = { enable = true; };
    irqbalance = { enable = true; };
    smartd = {
      enable = true;
      notifications.x11.enable = true;
    };

    lorri = { enable = true; };
    blueman = { enable = true; };
    prometheus = { exporters = { node = { enable = true; }; }; };
    printing = {
      enable = true;
      drivers = [
        pkgs.gutenprint
        pkgs.gutenprintBin
        pkgs.epson-escpr
        pkgs.epson-escpr2
      ];
    };
    xserver = {

      enable = true;
      layout = "br";
      xkbModel = "abnt2";
      xkbVariant = "abnt2";
      libinput = { enable = true; };
      displayManager = {
        lightdm = { enable = true; };
        gdm = { enable = false; };
        sddm = { enable = false; };
        defaultSession = "none+awesome";
      };
      windowManager = { awesome = { enable = true; }; };
      desktopManager = {
        xfce = { enable = true; };
        plasma5 = { enable = false; };
      };
      videoDrivers = [ "nvidia" ];
      dpi = 96;
    };
    physlock = {
      enable = true;
      allowAnyUser = true;
      lockMessage = "H4CK3D";
    };
    picom = { enable = true; };
    fstrim = { enable = true; };
    sysstat = { enable = true; };
  };

# Hardware
  hardware = {
    steam-hardware = { enable = true; };
    pulseaudio = {
      enable = true;
      support32Bit = true;
    };
    opengl = {
      enable = true;
      driSupport32Bit = true;
      extraPackages32 = with pkgs.pkgsi686Linux; [ libva ];
    };
    bluetooth = {
      enable = true;
      powerOnBoot = false;
    };
    cpu = { intel = { updateMicrocode = true; }; };
    sane = { enable = true; };
    nvidia = {
      prime = {
        offload = { enable = true; };
        intelBusId = "PCI:0:2:0";
        nvidiaBusId = "PCI:1:0:0";
      };
    };

  };
  sound = { enable = true; };