use pypy nightly to work around bug
use pypy nightly to work around bug

jakirkham/numpy,pdebuyl/numpy,pbrod/numpy,anntzer/numpy,simongibbons/numpy,charris/numpy,jakirkham/numpy,charris/numpy,seberg/numpy,numpy/numpy,rgommers/numpy,mattip/numpy,mattip/numpy,mhvk/numpy,jakirkham/numpy,pdebuyl/numpy,seberg/numpy,endolith/numpy,simongibbons/numpy,pbrod/numpy,pdebuyl/numpy,pbrod/numpy,mhvk/numpy,anntzer/numpy,anntzer/numpy,simongibbons/numpy,mhvk/numpy,rgommers/numpy,seberg/numpy,simongibbons/numpy,numpy/numpy,pdebuyl/numpy,jakirkham/numpy,mattip/numpy,rgommers/numpy,mattip/numpy,charris/numpy,simongibbons/numpy,numpy/numpy,rgommers/numpy,endolith/numpy,jakirkham/numpy,endolith/numpy,mhvk/numpy,charris/numpy,endolith/numpy,anntzer/numpy,pbrod/numpy,mhvk/numpy,numpy/numpy,pbrod/numpy,seberg/numpy