anchor.diff:      postFixup = ''
         wrapPythonPrograms
         wrapProgram $out/bin/ceph-mgr --prefix PYTHONPATH ":" "$(toPythonPath ${placeholder "out"}):$(toPythonPath ${ceph-python-env})"
  +
  +      # Test that ceph-volume exists since the build system has a tendency to
  +      # silently drop it with misconfigurations.
  +      test -f $out/bin/ceph-volume
       '';
   
       enableParallelBuilding = true;
  
positive.code: 
        # for pybind/rgw to find internal dep
        export LD_LIBRARY_PATH="$PWD/build/lib:$LD_LIBRARY_PATH"
        # install target needs to be in PYTHONPATH for "*.pth support" check to succeed
  
        patchShebangs src/script src/spdk src/test src/tools
      '';
  
negative.code:         platforms = [ "x86_64-linux" ];
        };
      } ''
        mkdir -p $out/{bin,etc,${sitePackages}}
        cp -r ${ceph}/bin/{ceph,.ceph-wrapped,rados,rbd,rbdmap} $out/bin
        cp -r ${ceph}/bin/ceph-{authtool,conf,dencoder,rbdnamer,syn} $out/bin
        cp -r ${ceph}/bin/rbd-replay* $out/bin
        cp -r ${ceph}/${sitePackages} $out/${sitePackages}
        cp -r ${ceph}/etc/bash_completion.d $out/etc
        # wrapPythonPrograms modifies .ceph-wrapped, so lets just update its paths
        substituteInPlace $out/bin/ceph          --replace ${ceph} $out
  