As we discussed on [SO](https://stackoverflow.com/questions/34700577/how-can-i-build-pyquery-for-pypy/34700615), I've [forked](https://github.com/ruipacheco/pyquery) pyquery and followed your instructions but I can't run pyquery without a segfault. Can you review my setup.py first and foremost? I changed the lxml version as [recommended](https://github.com/gawel/pyquery/issues/121) by the maintainer of pyquery.