anchor.diff: -{ lib, fetchurl, cmake, buildPythonPackage, libxml2, libxslt, pysideApiextractor, pysideGeneratorrunner, python, sphinx, qt4, isPy3k, isPy35, isPy36, isPy37 }:
  +{ lib, fetchurl, buildPythonPackage
  +, cmake
  +, libxml2
  +, pkg-config
  +, libxslt
  +, pysideApiextractor
  +, pysideGeneratorrunner
  +, python
  +, sphinx
  +, qt4
  +, isPy3k
  +, isPy35
  +, isPy36
  +, isPy37
  +}:
   
  -# This derivation provides a Python module and should therefore be called via `python-packages.nix`.
  -# Python 3.5 is not supported: https://github.com/PySide/Shiboken/issues/77
   buildPythonPackage rec {
     pname = "pyside-shiboken";
     version = "1.2.4";
  +  disabled = !isPy3k;
   
     format = "other";
   
  
positive.code:   # gcc6 patch was also sent upstream: https://github.com/pyside/Shiboken/pull/86
    patches = [ ./gcc6.patch ] ++ (lib.optional (isPy35 || isPy36 || isPy37) ./shiboken_py35.patch);
  
    cmakeFlags = lib.optional isPy3k "-DUSE_PYTHON3=TRUE";
  
    meta = {
      description = "Plugin (front-end) for pyside-generatorrunner, that generates bindings for C++ libraries using CPython source code";
  
negative.code:     sha256 = "1536f73a3353296d97a25e24f9554edf3e6a48126886f8d21282c3645ecb96a4";
    };
  
    enableParallelBuilding = true;
  
    nativeBuildInputs = [ cmake pkg-config pysideApiextractor pysideGeneratorrunner sphinx qt4 ];
  
    buildInputs = [ python libxml2 libxslt ];
  
    preConfigure = ''
      echo "preConfigure: Fixing shiboken_generator install target."
  