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:       modules.sqlite3
      ];
  
      # Test does not work on Py3k because it calls 'python'.
      # https://github.com/nipy/nibabel/issues/341
  
      # 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
      preCheck = ''
        rm nisext/tests/test_testers.py
        rm nibabel/tests/test_proxy_api.py
      '';
  
      meta = {
  
negative.code: 
      # Uses python 2 print. Master seems to be Py3 compatible.
      disabled = isPy3k;
  
      src = pkgs.fetchurl {
        url = "http://pypi.python.org/packages/source/n/nipype/${name}.tar.gz";
        md5 = "480013709633a6d292e2ef668443e0c9";
  