anchor.diff:  
     meta = with stdenv.lib; {
       description = "Python package to read and write DXF drawings (interface to the DXF file format)";
  -    homepage = https://github.com/mozman/ezdxf/;
  +    homepage = "https://github.com/mozman/ezdxf/";
       license = licenses.mit;
       maintainers = with maintainers; [ hodapp ];
       platforms = platforms.unix;
  
positive.code: { stdenv, buildPythonPackage, pythonOlder, fetchFromGitHub, pyparsing, pytest }:
  
  buildPythonPackage rec {
    version = "0.9";
    pname = "ezdxf";
  
    disabled = pythonOlder "3.5";
  
negative.code:     owner = "mozman";
      repo = "ezdxf";
      rev = "v${version}";
      sha256 = "167iw1j1c6195bwv6i8z1m7s0i27r0y0acxd2w76hvnq3a72jbsd";
    };
  
    checkInputs = [ pytest ];
  