{ config, pkgs, ... }:
{
    nixpkgs.config = {
    allowUnfree = true;
    packageOverrides = pkgs: {
        docker =
            (
                import
                    (
                        builtins.fetchTarball {
                            url = https://github.com/NixOS/nixpkgs/archive/ff2b0316b4d0c861790fb407aa827a8eaf2634c5.tar.gz;
                            sha256="0kd9s27zv19i2mk3f46cjsy92jiv56nhfxay7s9av5nx7l7imy1h";
                        }
                    )
                    {
                        config = {};
                    }
            ).docker;
    };

    chromium.enableWideVine = true;
  };
    # Use the systemd-boot EFI boot loader.
    boot.loader.systemd-boot.enable = true;
    boot.loader.efi.canTouchEfiVariables = true;
    boot.supportedFilesystems = ["zfs"];

    networking.nameservers = [
        "1.1.1.1"
        "1.0.0.1"
    ];
    i18n = {
     consoleFont = "Lat2-Terminus16";
     consoleKeyMap = "us";
     defaultLocale = "en_US.UTF-8";
   };
    time.timeZone = "Europe/Amsterdam";
    environment.pathsToLink = [ "/share/zsh" ];
    programs.gnupg.agent = { enable = true; enableSSHSupport = true; };
     # Enable the OpenSSH daemon.
    services.openssh.enable = true;
    services.printing.enable = true;
    virtualisation.docker.enable = true;
    virtualisation.libvirtd.enable = true;
    # networking.firewall.allowedTCPPorts = [ ... ];
    # networking.firewall.allowedUDPPorts = [ ... ];
    # Or disable the firewall altogether.
    networking.firewall.enable = false;
    # Enable sound.
    sound.enable = true;
    hardware.pulseaudio.enable = true;

    # Enable the X11 windowing system.
    services.xserver.enable = true;
    services.xserver.layout = "us";
    # Define a user account. Don't forget to set a password with ‘passwd’.
    users.users.fabi = {
            extraGroups = ["wheel" "docker" "libvirtd"];
            isNormalUser = true;
            uid = 1000;
            shell = pkgs.zsh;
    };
    # This value determines the NixOS release with which your system is to be
    # compatible, in order to avoid breaking some software such as database
    # servers. You should change this only after NixOS release notes say you
    # should.
    system.stateVersion = "18.09"; # Did you read the comment?
    swapDevices = [{device = "/dev/zvol/rpool/swap"; size = 8000;}];# zfs create -V 8G -b $(getconf PAGESIZE)               -o logbias=throughput -o sync=always              -o primarycache=metadata               -o com.sun:auto-snapshot=false zpool/swap
}