anchor.diff:    meta = with stdenv.lib; {
       description = "NixOS vulnerability scanner";
       homepage = https://github.com/flyingcircusio/vulnix;
  -    license = licenses.bsd2;
  +    license = licenses.bsd3;
       maintainers = with maintainers; [ ckauhaus plumps ];
     };
   }
  
positive.code: 
  pythonPackages.buildPythonApplication rec {
    pname = "vulnix";
    version = "1.6.3";
  
    src = pythonPackages.fetchPypi {
      inherit pname version;
      sha256 = "0ia71l0210dgcxf63bg07csx40nmpdghr4mszz91qrri7lsa5qqi";
    };
  
    buildInputs = [ ronn ];
  
    checkInputs = with pythonPackages; [ freezegun pytest pytestcov pytest-flake8 ];
  
    propagatedBuildInputs = [
      nix
  
negative.code: 
    outputs = [ "out" "doc" ];
  
    postBuild = "make -C doc";
  
    checkPhase = "py.test src/vulnix";
  
  