anchor.diff:    cfg = config.services.chrony;
   
     stateDir = "/var/lib/chrony";
  +  driftFile = "${stateDir}/chrony.drift";
     keyFile = "${stateDir}/chrony.keys";
   
     configFile = pkgs.writeText "chrony.conf" ''
  
positive.code: 
      systemd.tmpfiles.rules = [
        "d ${stateDir} 0755 chrony chrony - -"
        "f ${keyFile} 0640 chrony chrony -"
      ];
  
  
negative.code:       "initstepslew ${toString cfg.initstepslew.threshold} ${concatStringsSep " " cfg.servers}"
      }
  
      driftfile ${driftFile}
      keyfile ${keyFile}
  
      ${optionalString (!config.time.hardwareClockInLocalTime) "rtconutc"}
  