nixos 25.05 with RTX-5090

configuration.nix

# /etc/nixos/configuration.nix
#
# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
    ];

  nixpkgs.config.packageOverrides = pkgs: {
    unstable = import <nixos-unstable> { config = config.nixpkgs.config; };
  };

  boot.kernelPackages = pkgs.unstable.linuxPackages_6_15;

  # Bootloader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
  boot.kernelParams = [ "nvidia-drm.modeset=1" ];

  # Load NVIDIA kernel modules but don't use for display
  boot.kernelModules = [ "nvidia" "nvidia_modeset" "nvidia_uvm" "nvidia_drm" ];
  boot.extraModulePackages = [ pkgs.unstable.linuxPackages_6_15.nvidia_x11_stable_open ];

  # Use Intel for X11/display
  services.xserver.videoDrivers = [ "modesetting" "nvidia" ]; # modesetting=Intel integrated graphics

  # Enable NVIDIA drivers but don't use for display
  hardware.nvidia = {
    package = pkgs.unstable.linuxPackages_6_15.nvidiaPackages.stable;
    open = true;
    modesetting.enable = true;
    nvidiaSettings = true;
  };

  hardware.graphics = {
    enable = true;
    enable32Bit = true;  # Replaces driSupport32Bit
    extraPackages = with pkgs; [
      intel-media-driver # Intel VAAPI
      vaapiIntel         # Intel VAAPI (older)
    ];
  };

  hardware.firmware = with pkgs; [
    linux-firmware
    # Add NVIDIA firmware explicitly
    config.boot.kernelPackages.nvidiaPackages.stable.firmware or pkgs.nvidia-firmware
  ];

  # no hibernate/sleep
  systemd.sleep.extraConfig = ''
  AllowSuspend=no
  AllowHibernation=no
  AllowHybridSleep=no
  AllowSuspendThenHibernate=no
'';

  networking.hostName = "rtx5090"; # Define your hostname.

  # Enable networking
  networking.networkmanager.enable = true;

  # Set your time zone.
  time.timeZone = "America/Denver";

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "en_US.UTF-8";
    LC_IDENTIFICATION = "en_US.UTF-8";
    LC_MEASUREMENT = "en_US.UTF-8";
    LC_MONETARY = "en_US.UTF-8";
    LC_NAME = "en_US.UTF-8";
    LC_NUMERIC = "en_US.UTF-8";
    LC_PAPER = "en_US.UTF-8";
    LC_TELEPHONE = "en_US.UTF-8";
    LC_TIME = "en_US.UTF-8";
  };

  # Enable the X11 windowing system.
  services.xserver.enable = true;

  # Enable the GNOME Desktop Environment.
  services.xserver.displayManager.gdm.enable = true;
  services.xserver.desktopManager.gnome.enable = true;

  # Configure keymap in X11
  services.xserver.xkb = {
    layout = "us";
    variant = "";
  };

  # Enable CUPS to print documents.
  services.printing.enable = true;

  # Enable sound with pipewire.
  services.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
    # If you want to use JACK applications, uncomment this
    #jack.enable = true;

    # use the example session manager (no others are packaged yet so this is enabled by default,
    # no need to redefine it in your config for now)
    #media-session.enable = true;
  };

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.user1 = {
    isNormalUser = true;
    description = "user1";
    extraGroups = [ "networkmanager" "wheel" "docker" ];
    packages = with pkgs; [
    #  thunderbird
    ];
  };

  # Install firefox.
  programs.firefox.enable = true;

  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;

  nix.settings.experimental-features = [ "nix-command" "flakes" ];

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    clinfo
    cudatoolkit
    hashcat
    pkgs.unstable.linuxPackages_6_15.nvidia_x11_stable_open
    pciutils
    usbutils
    vim
  #  wget
  ];

  environment.shellInit = ''
    export LD_LIBRARY_PATH="${pkgs.lib.makeLibraryPath [  pkgs.cudatoolkit.lib pkgs.cudaPackages.cuda_nvml_dev ]}:/run/opengl-driver/lib"
  '';

  # List services that you want to enable:

  # Enable the OpenSSH daemon.
  services.openssh.enable = true;

  # Open ports in the firewall.
  networking.firewall.allowedTCPPorts = [ 22 ];

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "25.05"; # Did you read the comment?

}