anchor.diff:          --replace '@@taskwarrior@@' '${pkgs.taskwarrior}'
       '';
   
  -    buildInputs = with self; [ nose pkgs.taskwarrior ];
  +    buildInputs = with self; [ nose pkgs.taskwarrior tox ];
       propagatedBuildInputs = with self; [ six dateutil pytz ];
   
       meta = {
  
positive.code:   };
  
    taskw = buildPythonPackage rec {
      version = "0.8.6";
      name = "taskw-${version}";
  
      src = pkgs.fetchurl {
        url = "https://pypi.python.org/packages/source/t/taskw/${name}.tar.gz";
        sha256 = "341a165a1c2ef94fb1c2a49a785357377f04a0d55cabe9563179849497e47146";
      };
  
      patches = [ ../development/python-modules/taskw/use-template-for-taskwarrior-install-path.patch ];
  
negative.code:     };
    };
  
    tox = buildPythonPackage rec {
      name = "tox-1.8.1";
  
      propagatedBuildInputs = with self; [ py virtualenv ];
  
  