Retornar 2 derivações para o environment.systemPackages

configuration.nix

# configuration.nix
{ config, pkgs, ... }:

  environment.systemPackages = [ (import ./win10boot.nix {inherit pkgs; }) ]

win10boot.nix

# ./win10boot.nix

{ pkgs, ... }: with pkgs; 

let desktop-item =  makeDesktopItem {
    name = "win10-boot-now";
    desktopName = "Windows 10 => Boot Now!";
    type = "Application";
    exec = "win10-boot-now";
  };

winscript = pkgs.writeScriptBin "win10-boot-now" ''
    #! /usr/bin/env nix-shell
    #! nix-shell -i bash -p efibootmgr -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-unstable.tar.gz
    WINENTRY=`efibootmgr -v | grep "Windows Boot Manager" | cut -d' ' -f1 | tr -d Boot*`
    sudo efibootmgr -n''${WINENTRY}
    reboot
  '';
in
  [ desktop-item winscript ] # Quero retornar essas duas derivações. Isso aqui vai dar erro. Mas coloquei assim pra passar a idéia.