anchor.diff:        $sourceRoot/opt/hopper-${rev}/lib/libpthread_workqueue.so* \
         $out/lib
   
  +    # we already ship libffi.so.7
  +    ln -s ${lib.getLib libffi}/lib/libffi.so $out/lib/libffi.so.6
  +
       cp -r $sourceRoot/usr/share $out
   
       runHook postInstall
  
positive.code: , gmpxx
  , ncurses5
  , gnustep
  }:
  stdenv.mkDerivation rec {
    pname = "hopper";
  
negative.code:     libbsd
      python27
      gmpxx
      ncurses5
      gnustep.libobjc
    ];
  