anchor.diff:    buildInputs = [
       nss nspr libqb
     ] ++ optional enableDbus dbus
  -    ++ optional enableInfiniBandRdma [ librdmacm libibverbs ]
  +    ++ optional enableInfiniBandRdma rdma-core
       ++ optional enableMonitoring libstatgrab
       ++ optional enableSnmp net_snmp;
   
  
positive.code:     "LOGROTATEDIR=$(out)/etc/logrotate.d"
    ];
  
    postInstall = ''
      wrapProgram $out/bin/corosync-blackbox \
        --prefix PATH ":" "$out/sbin:${libqb}/sbin"
  
negative.code: { stdenv, fetchurl, makeWrapper, pkgconfig, nss, nspr, libqb
  , dbus, rdma-core, libstatgrab, net_snmp
  , enableDbus ? false
  , enableInfiniBandRdma ? false
  , enableMonitoring ? false
  