anchor.diff:    nativeBuildInputs = [ makeWrapper pkg-config ];
   
     buildInputs = [
  -    kronosnet nss nspr libqb
  +    kronosnet nss nspr libqb systemd.dev
     ] ++ optional enableDbus dbus
       ++ optional enableInfiniBandRdma rdma-core
       ++ optional enableMonitoring libstatgrab
  
positive.code:     "--with-logdir=/var/log/corosync"
      "--enable-watchdog"
      "--enable-qdevices"
    ] ++ optional enableDbus "--enable-dbus"
      ++ optional enableInfiniBandRdma "--enable-rdma"
      ++ optional enableMonitoring "--enable-monitoring"
  
negative.code: { lib, stdenv, fetchurl, makeWrapper, pkg-config, kronosnet, nss, nspr, libqb
  , systemd, dbus, rdma-core, libstatgrab, net-snmp
  , enableDbus ? false
  , enableInfiniBandRdma ? false
  , enableMonitoring ? false
  