{ ... }:
let
  impermanence = builtins.fetchTarball {
    url = "https://github.com/nix-community/impermanence/archive/master.tar.gz";
  };
in
{
  imports = [ "${impermanence}/nixos.nix" ];

  environment.persistence."/persist" = {
    enable = true; # NB: Defaults to true, not needed
    hideMounts = true;
    directories = [
      # "/etc/NetworkManager/system-connections"
      # {
      #   directory = "/var/lib/colord";
      #   user = "colord";
      #   group = "colord";
      #   mode = "u=rwx,g=rx,o=";
      # }
    ];
    files = [
      # "/etc/machine-id"
      # {
      #   file = "/var/keys/secret_file";
      #   parentDirectory = {
      #     mode = "u=rwx,g=,o=";
      #   };
      # }
    ];
    users.vili = {
      # directories = [
      #   "VirtualBox VMs"
      #   {
      #     directory = ".gnupg";
      #     mode = "0700";
      #   }
      # ];
      # files = [
      #   ".screenrc"
      # ];
    };
  };
}