anchor.diff:  
         preStart = ''
           mkdir -m 0755 -p ${stateDir}
  -        touch ${keyFile}
  -        chmod 0640 ${keyFile}
  -        chown chrony:chrony ${stateDir} ${keyFile}
         '';
   
         serviceConfig = {
  
positive.code:     "@${pkgs.chrony}/bin/chronyd" "chronyd"
      "-n"
      "-m"
      "-u" "chrony"
      "-f" cfgFile
    ] ++ cfg.extraCmdline;
  
negative.code:       initstepslew 30 ${concatStringsSep " " cfg.initstepslew.servers}
      ''}
  
      driftfile ${stateDir}/drift
      dumpdir ${stateDir}
      dumponexit
  
      hwclockfile /etc/adjtime
      rtcdevice /dev/rtc
      rtcfile ${stateDir}/rtc
  
      ${cfg.extraConfig}
    '';
  