anchor.diff:      version = "2.5.1";
       disabled = isPy3k;
   
  -    configurePhase = "find -name 'configure' -exec chmod a+x {} \\; ; find -name 'aconfigure' -exec chmod a+x {} \\; ; ${python}/bin/${python.executable} setup.py build_ext --pjsip-clean-compile";
  -
       src = pkgs.fetchurl {
         url = "http://download.ag-projects.com/SipClient/python-${name}.tar.gz";
         sha256 = "0vpy2vss8667c0kp1k8vybl38nxp7kr2v2wa8sngrgzd65m6ww5p";
       };
   
       propagatedBuildInputs = with self; [ cython pkgs.openssl dns dateutil xcaplib msrplib lxml ];
  -
       buildInputs = with pkgs; [ alsaLib ffmpeg libv4l pkgconfig sqlite libvpx ];
  -
  -    installPhase = "${python}/bin/${python.executable} setup.py install --prefix=$out";
   
       doCheck = false;
     };
  
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:     propagatedBuildInputs = with self; [ urlgrabber ];
  
      checkPhase = ''
        ${python.interpreter} tests/baseclass.py -vv
      '';
  
      meta = {
  