diff -up ./setup.py.orig ./setup.py
--- ./setup.py.orig 2016-06-22 21:26:16.000000000 +0200
+++ ./setup.py 2017-07-02 22:17:54.301963250 +0200
@@ -83,7 +83,7 @@ else:
# Force `setup_requires` stuff like Cython to be installed before proceeding
#
from setuptools.dist import Distribution
- Distribution(dict(setup_requires='Cython>=0.19.1'))
+ Distribution(dict(setup_requires='Cython>=0.19'))
from Cython.Distutils import build_ext as _build_ext
from distutils.dir_util import remove_tree