anchor.diff:  { stdenv, fetchurl, pkgconfig, unzip, which
  -, libuuid, attr, xfsprogs, cppunit
  +, libuuid, attr, xfsprogs, cppunit, rdma-core
   , zlib, openssl, sqlite, jre, openjdk, ant
   } :
   
  
positive.code:   };
  
    nativeBuildInputs = [ which unzip pkgconfig cppunit openjdk ant];
    buildInputs = [ libuuid attr xfsprogs zlib openssl sqlite jre ];
  
    postPatch = ''
      patchShebangs ./
  
negative.code: 
    buildPhase = ''
      for i in ${toString subdirs}; do
        make -C $i BEEGFS_OPENTK_IBVERBS=1
      done
      make -C beegfs_admon/build admon_gui BEEGFS_OPENTK_IBVERBS=1
    '';
  
    installPhase = ''
  