anchor.diff:          package_data = {'openbabel' : ['_openbabel.so']}
       )
       EOF
  -    '';
  +  '';
   
     meta = with lib; {
       description = "A toolbox designed to speak the many languages of chemical data";
  
positive.code: {stdenv, lib, fetchurl, cmake, zlib, libxml2, eigen, python, cairo, pcre, pkg-config, swig, rapidjson }:
  
  stdenv.mkDerivation rec {
    pname = "openbabel";
    version = "3.1.1";
  
    src = fetchurl {
      url = "https://github.com/openbabel/openbabel/archive/openbabel-${lib.replaceStrings ["."] ["-"] version}.tar.gz";
      sha256 = "c97023ac6300d26176c97d4ef39957f06e68848d64f1a04b0b284ccff2744f02";
    };
  
  
    buildInputs = [ zlib libxml2 eigen python cairo pcre swig rapidjson ];
  
  
negative.code:     "-DPYTHON_BINDINGS=ON"
    ];
  
    postFixup = ''
      cat <<EOF > $out/lib/python$pythonMajorMinor/site-packages/setup.py
      from distutils.core import setup
  