rather than only specifying a build dependency on cpython and pypy, use pypy or not pypy.
It' unclear if CFFI is more likely to work for other backends? Who knows! But this matches longstanding behavior where Cython is used "unless pypy", now the dependency matches the internal logic.
closes #1984 (confirmed with docker run pyston/pyston pip install pyzmq and pip install . with this branch)
rather than only specifying a build dependency on cpython and pypy, use pypy or not pypy.
It' unclear if CFFI is more likely to work for other backends? Who knows! But this matches longstanding behavior where Cython is used "unless pypy", now the dependency matches the internal logic.
closes #1984 (confirmed with
docker run pyston/pyston pip install pyzmqandpip install .with this branch)