{ config, lib, pkgs, ... }: {
  system = {
    copySystemConfiguration = true;
    stateVersion = "23.11";
  };
  time = {
    timeZone = "America/Mexico_City";
    hardwareClockInLocalTime = true;
  };
  i18n = {
    defaultLocale = "en_CA.UTF-8";
    extraLocaleSettings = { LC_MONETARY = "es_MX.UTF-8"; };
  };
  console = {
    font = "Lat2-Terminus16";
    keyMap = "us";
    #  useXkbConfig = true; # use xkbOptions in tty.
  };
  security = {
    polkit.enable = true;
    sudo = {
      enable = true;
      wheelNeedsPassword = false;
    };
    pam.loginLimits = [{
      domain = "*";
      type = "soft";
      item = "nofile";
      value = "8192";
    }];
  };
  nix = {
    optimise.automatic = true;
    gc = {
      automatic = true;
      dates = "weekly";
    };
    settings = {
      auto-optimise-store = true;
      experimental-features = [ "nix-command" "flakes" ];
      substituters = [
        "https://nix-gaming.cachix.org"
        "https://nixpkgs-python.cachix.org"
        "https://devenv.cachix.org"
        "https://cuda-maintainers.cachix.org"
        "https://ai.cachix.org"
      ];
      trusted-public-keys = [
        "nix-gaming.cachix.org-1:nbjlureqMbRAxR1gJ/f3hxemL9svXaZF/Ees8vCUUs4="
        "nixpkgs-python.cachix.org-1:hxjI7pFxTyuTHn2NkvWCrAUcNZLNS3ZAvfYNuYifcEU="
        "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw="
        "cuda-maintainers.cachix.org-1:0dq3bujKpuEPMCX6U4WylrUDZ9JyUG0VpVZa7CNfq5E="
        "ai.cachix.org-1:N9dzRK+alWwoKXQlnn0H6aUx0lU/mspIoz8hMvGvbbc="
      ];
    };
  };
  users.groups.piracy.gid = 985;
  environment = {
    systemPackages = with pkgs; [ wget ];
    variables = rec {
      # PATH
      XDG_CACHE_HOME = "\${HOME}/.cache";
      XDG_CONFIG_HOME = "\${HOME}/.config";
      XDG_BIN_HOME = "\${HOME}/.local/bin";
      XDG_DATA_HOME = "\${HOME}/.local/share";
      XDG_STATE_HOME = "\${HOME}/.local/state";

      # DEV PATH
      CABAL_DIR = "${XDG_CACHE_HOME}/cabal";
      CARGO_HOME = "${XDG_DATA_HOME}/cargo";
      GEM_HOME = "${XDG_DATA_HOME}/ruby/gems";
      GEM_PATH = "${XDG_DATA_HOME}/ruby/gems";
      GEM_SPEC_CACHE = "${XDG_DATA_HOME}/ruby/specs";
      GOPATH = "${XDG_DATA_HOME}/go";
      NPM_CONFIG_USERCONFIG = "${XDG_CONFIG_HOME}/npm/npmrc";
      PNPM_HOME = "${XDG_DATA_HOME}/pnpm";
      PSQL_HISTORY = "${XDG_DATA_HOME}/psql_history";
      REDISCLI_HISTFILE = "${XDG_DATA_HOME}/redis/rediscli_history";
      WINEPREFIX = "${XDG_DATA_HOME}/wine";
      PYTHONSTARTUP = "${XDG_CONFIG_HOME}/python/pythonrc";
      STACK_ROOT = "${XDG_DATA_HOME}/stack";

      # OPTIONS
      HISTFILE = "${XDG_STATE_HOME}/bash/history";
      LESSHISTFILE = "-";
      GHCUP_USE_XDG_DIRS = "true";
      RIPGREP_CONFIG_PATH = "${XDG_CONFIG_HOME}/ripgrep/ripgreprc";
      ELECTRUMDIR = "${XDG_DATA_HOME}/electrum";
      VISUAL = "emacsclient -ca emacs";
      WGETRC = "${XDG_CONFIG_HOME}/wgetrc";
      XCOMPOSECACHE = "${XDG_CACHE_HOME}/X11/xcompose";
      "_JAVA_OPTIONS" = "-Djava.util.prefs.userRoot=${XDG_CONFIG_HOME}/java";
      DOCKER_CONFIG = "${XDG_CONFIG_HOME}/docker";

      # NVIDIA
      CUDA_CACHE_PATH = "${XDG_CACHE_HOME}/nv";

      # Themes
      # WEBKIT_DISABLE_COMPOSITING_MODE = "1";
      CALIBRE_USE_SYSTEM_THEME = "1";

      PATH = [
        "\${HOME}/.local/bin"
        "${XDG_CONFIG_HOME}/emacs/bin"
        "${XDG_DATA_HOME}/npm/bin"
        "${XDG_DATA_HOME}/pnpm"
      ];
    };
  };
  programs = {
    starship.enable = true;
    tmux.enable = true;
    fzf.fuzzyCompletion = true;
    neovim = {
      enable = true;
      vimAlias = true;
    };
    gnupg.agent = {
      enable = true;
      enableSSHSupport = true;
    };
  };
  services = {
    smartd.enable = true;
    fstrim.enable = true;
    btrfs.autoScrub = {
      enable = true;
      fileSystems = [ "/" ];
    };
    avahi = {
      enable = true;
      nssmdns = true;
    };
    openssh = {
      enable = true;
      openFirewall = true;
      startWhenNeeded = true;
      settings = {
        PasswordAuthentication = false;
        PermitRootLogin = "prohibit-password";
        KbdInteractiveAuthentication = false;
      };
    };
  };
  fonts.fontconfig.enable = true;
  powerManagement.cpuFreqGovernor = lib.mkDefault "performance";
}