Xenial pypy3 image includes broken numpy

Trying to import numpy leads to (this trace is from trying to pip install matplotlib):

Traceback (most recent call last):
File “/home/travis/virtualenv/pypy3.6-7.1.1/site-packages/numpy/core/init.py”, line 40, in
from . import multiarray
File “/home/travis/virtualenv/pypy3.6-7.1.1/site-packages/numpy/core/multiarray.py”, line 12, in
from . import overrides
File “/home/travis/virtualenv/pypy3.6-7.1.1/site-packages/numpy/core/overrides.py”, line 6, in
from numpy.core._multiarray_umath import (
ImportError: /home/travis/virtualenv/pypy3.6-7.1.1/site-packages/numpy/core/_multiarray_umath.pypy3-71-x86_64-linux-gnu.so: undefined symbol: PyStructSequence_InitType2

pip install of numpy of different version fixes this problem.

Imprint