anchor.diff:          Group = cfg.group;
           Restart = "on-failure";
           RestartSec = 1;
  -      };
  +      } // optionalAttrs (cfg.serviceFdlimit != null) { LimitNOFILE = cfg.serviceFdlimit; };
       };
   
     };
  
positive.code:         Group = cfg.group;
          Restart = "on-failure";
          RestartSec = 1;
        };
      };
  
      systemd.services.ipfs-norouting = {
  
negative.code:   cfg = config.services.ipfs;
  
    ipfsFlags = toString ([
      (optionalString (cfg.serviceFdlimit != null) "--manage-fdlimit=true")
      (optionalString cfg.autoMount   "--mount")
      (optionalString cfg.autoMigrate "--migrate")
      (optionalString cfg.enableGC    "--enable-gc")
  