anchor.diff:        rev = "refs/tags/${name}";
         sha256 = "16jb8x5hbs3g4dq10y6rqc1005bnffwnlws8x7j1d96n7k9mjn8h";
       };
  +
  +    patchPhase = ''
  +      substituteInPlace setup.py --replace "version=versioneer.get_version()" "version='${version}'"
  +    '';
   
       propagatedBuildInputs = with self;
         [ pyptlib argparse twisted pycrypto pyyaml ];
  
positive.code:         --replace '"/usr/lib"' '"${pkgs.binutils}/lib"'
      '';
  
      # --old-and-unmanageable not supported by this setup.py
      installPhase = ''
        mkdir -p "$out/lib/${python.libPrefix}/site-packages"
  
        export PYTHONPATH="$out/lib/${python.libPrefix}/site-packages:$PYTHONPATH"
  
        ${python}/bin/${python.executable} setup.py install \
          --install-lib=$out/lib/${python.libPrefix}/site-packages \
          --prefix="$out"
      '';
  
      meta = {
        homepage = https://github.com/Groundworkstech/pybfd;
        description = "A Python interface to the GNU Binary File Descriptor (BFD) library";
  
negative.code:       url = "http://pypi.python.org/packages/source/p/pyrax/${name}.tar.gz";
        sha256 = "0hvim60bhgfj91m7pp8jfmb49f087xqlgkqa505zw28r7yl0hcfp";
      };
  
      propagatedBuildInputs = with self; [ requests2 ];
  
      meta = {
        homepage    = "https://github.com/rackspace/pyrax";
  