anchor.diff:  
       src = pkgs.fetchurl {
         url = "https://pypi.python.org/packages/source/r/restview/${name}.tar.gz";
  -      sha256 = "0rda1py5fqzs5fkfjrdli74zf72wijxc9j3989mivhrbrslx3vjj";
  +      sha256 = "18diqmh6vwz6imcmvwa7s2v4562y73n072d5d7az2r2ks0g2bzdb";
       };
   
       propagatedBuildInputs = with self; [ docutils readme pygments ];
       buildInputs = with self; [ mock ];
  +
  +    patchPhase = ''
  +      # dict order breaking tests
  +      sed -i 's@<a href="http://www.example.com" rel="nofollow">@...@' src/restview/tests.py
  +    '';
   
       meta = {
         description = "ReStructuredText viewer";
  
positive.code:     buildInputs = with self; [
       requests-mock
      ];
  
      meta = with stdenv.lib; {
        homepage = "http://wiki.openstack.org/OpenStackClient";
  
negative.code:   networking-hyperv = buildPythonPackage rec {
      name = "networking-hyperv-${version}";
      version = "2015.1.0";
      disabled = isPy3k;  # failing tests
  
      src = pkgs.fetchurl {
        url = "https://pypi.python.org/packages/source/n/networking-hyperv/${name}.tar.gz";
  