{
  extraDirectories,
  extraFiles,
  username ? throw "need to know the username",
  nixIndexEnabled ? false,
  ...
}: {
  home.persistence."/persist/home/${username}" = {
    directories =
      [
        # "Downloads" # no.
        "Documents"
        "Music"
        "Pictures"
        "Videos"
        ".gnupg"
        ".ssh"
        ".local"
        ".cache/mesa_shader_cache"
        ".cache/mesa_shader_cache_db"
        # TODO: Move this shit into work user
      ]
      ++ (
        if (extraDirectories == null)
        then []
        else extraDirectories
      );
    files =
      [
        ".gitconfig"
        # ".zsh_history"
      ]
      ++ (
        if (extraFiles == null)
        then []
        else extraFiles
      )
      # ++ (if nixIndexEnabled then [ ".cache/nix-index" ] else [])
      ;
    allowOther = true;
  };
}