anchor.diff:      version = "1.10";
       name = "networkx-${version}";
   
  -    # Currently broken on PyPy. 
  +    # Currently broken on PyPy.
       # https://github.com/networkx/networkx/pull/1361
       disabled = isPyPy;
  -    
  +
       src = pkgs.fetchurl {
         url = "https://pypi.python.org/packages/source/n/networkx/${name}.tar.gz";
         sha256 = "ced4095ab83b7451cec1172183eff419ed32e21397ea4e1971d92a5808ed6fb8";
  
positive.code:       homepage = http://scikit-learn.org;
        license = licenses.bsd3;
        maintainers = with maintainers; [ fridh ];
      };  
    };
  
    scripttest = buildPythonPackage rec {
  
negative.code:       modules.sqlite3
      ];
  
      preCheck = ''
        # Test does not work on Py3k because it calls 'python'.
        # https://github.com/nipy/nibabel/issues/341
        rm nisext/tests/test_testers.py
        # Test fails with numpy 1.10.1: ERROR: nibabel.tests.test_proxy_api.TestPARRECAPI.test_proxy_slicing
        # See https://github.com/nipy/nibabel/pull/358
        # and https://github.com/numpy/numpy/issues/6491
        rm nibabel/tests/test_proxy_api.py
        # https://github.com/nipy/nibabel/issues/366
        rm nisext/tests/test_doctest_markup.py
      '';
  
      meta = {
  