anchor.diff: -{ stdenv, pythonPackages }:
  +{ stdenv, pythonPackages, fetchpatch }:
   
  -pythonPackages.buildPythonApplication rec {
  +with pythonPackages;
  +
  +buildPythonApplication rec {
     pname = "td-watson";
  -  name = "${pname}-${version}";
  -  version = "1.4.0";
  +  version = "1.5.2";
   
  -  src = pythonPackages.fetchPypi {
  +  src = fetchPypi {
       inherit version pname;
  -    sha256 = "1py0g4990jmvq0dn7jasda7f10kzr41bix46hnbyc1rshjzc17hq";
  +    sha256 = "6e03d44a9278807fe5245e9ed0943f13ffb88e11249a02655c84cb86260b27c8";
     };
   
     # uses tox, test invocation fails
  
positive.code:   checkPhase = ''
      py.test -vs tests
   '';
    checkInputs = with pythonPackages; [ py pytest pytest-datafiles mock pytest-mock pytestrunner ];
    propagatedBuildInputs = with pythonPackages; [ requests click arrow ];
  
    meta = with stdenv.lib; {
      homepage = https://tailordev.github.io/Watson/;
  
negative.code:     license = licenses.mit;
      maintainers = with maintainers; [ mguentner ] ;
    };
  }
  