anchor.diff:  
         # 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
  +      # set PYTHONPATH, so the build system doesn't silently skip installing ceph-volume and others
  +      export PYTHONPATH=${ceph-python-env}/${sitePackages}:$lib/${sitePackages}:$out/${sitePackages}
   
         patchShebangs src/script src/spdk src/test src/tools
       '';
  
positive.code:     postFixup = ''
        wrapPythonPrograms
        wrapProgram $out/bin/ceph-mgr --prefix PYTHONPATH ":" "$(toPythonPath ${placeholder "out"}):$(toPythonPath ${ceph-python-env})"
      '';
  
      enableParallelBuilding = true;
  
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
  