{ den, inputs, ... }: {
  den.aspects.core.nixos = { pkgs, ... }:
  let
    pkgs-unstable = inputs.nixpkgs-unstable.legacyPackages.${pkgs.system};
  in {
    nixpkgs.config.allowUnfree = true;

    nix = {
      settings = {
        experimental-features = [ "nix-command" "flakes" ];
        auto-optimise-store = true;        
      };
      gc = {
        automatic = true;
        dates = "weekly";
        options = "--delete-older-than 7d";
      };
    };

    zramSwap =  {
      enable = true;
      algorithm = "zstd";
      memoryPercent = 300;
    };

    services.xserver = {
      enable = false;
      xkb.layout = "en";
    };

    environment.systemPackages = with pkgs; [
      curl
      wget
      pkgs-unstable.neovim
      btop
      nixd
      unrar
      p7zip
    ]; 

    networking.networkmanager.enable = true;
    time.timeZone = "America/Sao_Paulo";
    i18n.defaultLocale = "en_US.UTF-8";

    services.dbus.enable = true;
    programs.dconf.enable = true;

    environment.sessionVariables = {
      XDG_SESSION_TYPE = "wayland";
      CLUTTER_BACKEND = "wayland";
      SDL_VIDEODRIVER = "wayland";
      MOZ_ENABLE_WAYLAND = "1";
      ELECTRON_OZONE_PLATFORM_HINT = "wayland";
      EDITOR = "nvim";
    };
  };
}