anchor.diff:      owner = "mozman";
       repo = "ezdxf";
       rev = "v${version}";
  -    sha256 = "1ggimjd9060b696sgzgxy9j9sl45wh9qbxnf0035qclafshprlzl";
  +    sha256 = "167iw1j1c6195bwv6i8z1m7s0i27r0y0acxd2w76hvnq3a72jbsd";
     };
   
     checkInputs = [ pytest ];
  
positive.code: { stdenv, buildPythonPackage, pythonOlder, fetchFromGitHub, pyparsing, pytest }:
  
  buildPythonPackage rec {
    version = "0.9";
    pname = "ezdxf";
  
    disabled = pythonOlder "3.5";
  
negative.code: 
    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/";
      license = licenses.mit;
      maintainers = with maintainers; [ hodapp ];
      platforms = platforms.unix;
  