anchor.diff:    };
   
     config = mkIf cfg.enable {
  +    # TODO: test user supplied config file pases syntax test
  +
       systemd.services.nginx = {
         description = "Nginx Web Server";
         after = [ "network.target" ];
  
positive.code: let
    cfg = config.services.nginx;
    nginx = cfg.package;
    configFileText = ''
      user ${cfg.user} ${cfg.group};
      daemon off;
  
  
negative.code:     ''}
      ${cfg.appendConfig}
    '';
  in
  
  {
  