anchor.diff:          '';
         };
   
  +      cronFiles = mkOption {
  +        type = types.listOf types.path;
  +        default = [];
  +        description = ''
  +          A list of extra crontab files that will be read and appended to the main
  +          crontab file when the cron service starts.
  +        '';
  +      };
  +
       };
   
     };
  
positive.code: 
          preStart =
            ''
              mkdir -m 710 -p /var/cron
  
              # By default, allow all users to create a crontab.  This
  
negative.code:     # should have sendmail in this path.
      sendmailPath = "/var/setuid-wrappers/sendmail";
    };
  
    allFiles = map (f: "\"${f}\"") (
      [ "${systemCronJobsFile}" ] ++ config.services.cron.cronFiles
    );
  
  in
  
  