{
  programs.nix-index = {
    enable = true;
    # package = pkgs.unstable_pkgs.nix-index;
    enableBashIntegration = true;
    enableZshIntegration = true;
  };

  #   systemd.user = {
  #     services."nix-index" = {
  #       Unit = {
  #         Description = "Update the nix-locate database";
  #         After = [ "network.target" ];
  #       };
  #       Service = {
  #         Type = "oneshot";
  #         ExecStart = "${config.programs.nix-index.package}/bin/nix-index";
  #       };
  #     };

  #     timers."nix-index" = {
  #       Unit.Description = "Daily update the nix-locate database";
  #       Timer = {
  #         OnCalendar = "daily";
  #         Persistent = true;
  #         Unit = "nix-index.service";
  #       };
  #       Install.WantedBy = [ "timers.target" ];
  #     };
  #   };
}