{config, lib, ...}: {
  options.u = {
    confPath = lib.mkOption {
      type = lib.types.path;
      description = "path to nixos config";
      default = "${config.home.homeDirectory}/.local/nixos";
    };
    tmux = {
      plugins = lib.mkOption {
        type = lib.types.listOf lib.types.package;
        description = "tmux plugins to source in config";
      };
      extraConfig = lib.mkOption {
        type = lib.types.lines;
        description = "extra config to append to bottom of config";
        default = "";
      };
    };
    bookmarks = lib.mkOption {
      type = lib.types.listOf (lib.types.submodule {
        options = {
          href = lib.mkOption {
            type = lib.types.str;
            description = "link of the bookmark";
            example = "file:///tmp";
          };
          name = lib.mkOption {
            type = lib.types.str;
            description = "name of the bookmark";
            example = "tmp";
          };
          icon = lib.mkOption {
            type = lib.types.str;
            description = "icon name of the bookmark";
            example = "folder-temp";
          };
        };
      });
      description = "list of file manager bookmarks";
    };
    lib = lib.mkOption {
      type = lib.types.attrs;
      description = "library";
    };
  };
  config.u.lib = rec {
    ln = base: x: config.lib.file.mkOutOfStoreSymlink "${base}/${x}";
    lnh = ln "${config.home.homeDirectory}";
    lnn = ln "${config.u.confPath}";
  };
}