anchor.diff:  
           wantedBy = [ "multi-user.target" ];
           after = [ "network.target" ];
  +        conflicts = [ "ntpd.service" "systemd-timesyncd.service" ];
   
           path = [ chrony ];
   
  
positive.code:       };
  
        servers = mkOption {
          default = [
            "0.nixos.pool.ntp.org"
            "1.nixos.pool.ntp.org"
            "2.nixos.pool.ntp.org"
            "3.nixos.pool.ntp.org"
          ];
          description = ''
            The set of NTP servers from which to synchronise.
          '';
  
negative.code:     # Make chronyc available in the system path
      environment.systemPackages = [ pkgs.chrony ];
  
      systemd.services.ntpd.enable = false;
  
      users.extraUsers = singleton
        { name = chronyUser;
          uid = config.ids.uids.chrony;
  