anchor.diff:      };
       propagatedBuildInputs = with self; [ pyparsing six ];
       buildInputs = with self; [ pytest pretend ];
  +
       meta = with pkgs.stdenv.lib; {
         description = "Core utilities for Python packages";
         homepage = "https://github.com/pypa/packaging";
         license = [ licenses.bsd2 licenses.asl20 ];
         maintainers = with maintainers; [ bennofs ];
       };
  -
  -    checkPhase = ''
  -      py.test
  -    '';
  +  };
  +
  +  pytoml = buildPythonPackage rec {
  +    name = "pytoml-${version}";
  +    version = "0.1.11";
  +
  +    checkPhase = "${python.interpreter} test/test.py";
  +
  +    # fetchgit used to ensure test submodule is available
  +    src = pkgs.fetchgit {
  +      url = "${meta.homepage}.git";
  +      rev = "refs/tags/v${version}";
  +      sha256 = "1jiw04zk9ccynr8kb1vqh9r1p2kh0al7g7b1f94911iazg7dgs9j";
  +    };
  +
  +    meta = {
  +      description = "A TOML parser/writer for Python";
  +      homepage    = https://github.com/avakar/pytoml;
  +      license     = licenses.mit;
  +      maintainers = with maintainers; [ peterhoeg ];
  +    };
     };
   
     pypandoc = buildPythonPackage rec {
  
positive.code:     };
    };
  
    packaging = buildPythonPackage rec {
      name = "packaging-16.8";
      src = pkgs.fetchurl {
  
negative.code: 
    pwntools = buildPythonPackage rec {
      name = "pwntools-${version}";
      version = "3.7.0";
  
      src = pkgs.fetchurl {
        url = "mirror://pypi/p/pwntools/${name}.tar.gz";
        sha256 = "1d2q42cmgh7l2k6l2gy4zllgj9a5qc59af3skp2b80hmv88h6vij";
      };
      propagatedBuildInputs = with self; [ Mako packaging pysocks pygments ROPGadget capstone paramiko pip psutil pyelftools pypandoc pyserial dateutil requests tox pkgs.pandoc unicorn intervaltree ];
  
      disabled = isPy3k;
  
  