anchor.diff:  
   pythonPackages.buildPythonApplication rec {
     pname = "vulnix";
  -  version = "1.6.3";
  +  version = "1.7";
   
     src = pythonPackages.fetchPypi {
       inherit pname version;
  -    sha256 = "0ia71l0210dgcxf63bg07csx40nmpdghr4mszz91qrri7lsa5qqi";
  +    sha256 = "16228w0vakb515cnrk4akadh0m21abiv8rv574jarcsf7359xslj";
     };
   
     buildInputs = [ ronn ];
   
  -  checkInputs = with pythonPackages; [ freezegun pytest pytestcov pytest-flake8 ];
  +  checkInputs = with pythonPackages; [
  +    freezegun
  +    pytest
  +    pytestcov
  +    pytest-flake8
  +  ];
   
     propagatedBuildInputs = [
       nix
  
positive.code:   meta = with stdenv.lib; {
      description = "NixOS vulnerability scanner";
      homepage = https://github.com/flyingcircusio/vulnix;
      license = licenses.bsd2;
      maintainers = with maintainers; [ ckauhaus plumps ];
    };
  }
  
negative.code: 
    outputs = [ "out" "doc" ];
  
    postBuild = "make -C doc";
  
    checkPhase = "py.test src/vulnix";
  
  