nixos/hosts/steamos/configuration.nix

{
  config,
  pkgs,
  lib,
  myConfig,
  inputs,
  ...
}: {
  imports = [
    # Include the results of the hardware scan.
    inputs.chaotic.nixosModules.default
    ./hardware-configuration.nix
  ];

  nix.settings.experimental-features = ["nix-command" "flakes"];
  nixpkgs.config.allowUnfree = true;

  ####################
  # Boot & Kernel    #
  ####################
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
  boot.loader.timeout = 0;
  boot.loader.limine.maxGenerations = 5;
  hardware.amdgpu.initrd.enable = true;

  boot.kernelParams = ["quiet"];
  boot.kernelPackages = pkgs.linuxPackages_cachyos;
  boot.kernel.sysctl = {
    "kernel.split_lock_mitigate" = 0;
    "kernel.nmi_watchdog" = 0;
    "kernel.sched_bore" = "1";
  };

  boot.initrd = {
    systemd.enable = true;
    kernelModules = [];
    verbose = false;
  };
  boot.plymouth.enable = true;
  boot.consoleLogLevel = 0;
  systemd.extraConfig = "DefaultTimeoutStopSec=5s";

  ################
  # FileSystems  #
  ################
  # fileSystems."/" = {
  #   options = ["compress=zstd"];
  # };

  ############
  # Network  #
  ############
  networking = {
    networkmanager.enable = true;
    firewall.enable = false;
    hostName = "nixos";
  };

  #################
  # Bluetooth     #
  #################
  hardware.bluetooth.enable = true;
  hardware.bluetooth.settings = {
    General = {
      MultiProfile = "multiple";
      FastConnectable = true;
    };
  };

  #################
  # Sound & RTKit #
  #################
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
  };

  ########################
  # Graphical & Greetd   #
  ########################

  services.xserver.enable = false;
  services.getty.autologinUser = "steamos";
  services.greetd = {
    enable = true;
    settings.default_session = {
      user = "${myConfig.essentials.Username}";
      command = "steam-gamescope > /dev/null 2>&1";
    };
  };

  ########################
  # Programs & Gaming    #
  ########################
  services.automatic-timezoned.enable = true;
  services.flatpak.enable = true;
  xdg.portal.enable = true;
  xdg.portal.config.common.default = "*";
  xdg.portal.extraPortals = [pkgs.xdg-desktop-portal-gtk];

  # programs.steam.gamescopeSession.args = ["-w 1920" "-h 1080" "-r 120" "--xwayland-count 2" "-e" "--hdr-enabled" "--mangoapp"];

  programs = {
    appimage = {
      enable = true;
      binfmt = true;
    };
    fish = {enable = true;};
    mosh = {enable = true;};
    tmux = {enable = true;};
    gamescope.capSysNice = true;
    steam = {
      enable = true;
      gamescopeSession.enable = true;
      extraCompatPackages = with pkgs; [proton-ge-bin];
      extraPackages = with pkgs; [
        mangohud
        gamescope-wsi
      ];
    };
  };

  environment.sessionVariables = {
    PROTON_USE_NTSYNC = "1";
    ENABLE_HDR_WSI = "1";
    DXVK_HDR = "1";
    PROTON_ENABLE_AMD_AGS = "1";
    PROTON_ENABLE_NVAPI = "1";
    ENABLE_GAMESCOPE_WSI = "1";
    STEAM_MULTIPLE_XWAYLANDS = "1";
  };

  ###################
  # Virtualization  #
  ###################
  virtualisation.docker.enable = true;
  virtualisation.docker.enableOnBoot = false;
  virtualisation.libvirtd.enable = true;

  ###############
  # Users       #
  ###############
  users.users.${myConfig.essentials.Username} = {
    isNormalUser = true;
    description = "SteamOS user";
    extraGroups = ["networkmanager" "wheel" "docker" "video" "seat" "audio" "libvirtd"];
    # password = "steamos";
  };

  #################
  # Security      #
  #################
  security.sudo.wheelNeedsPassword = false;
  security.polkit.enable = true;
  services.seatd.enable = true;
  services.openssh.enable = true;

  ######################
  ######################

  ########################
  # System State Version #
  ########################
  system.stateVersion = "25.05";
}