$ sudo pip install gevent==1.1a2
Collecting gevent==1.1a2
Using cached gevent-1.1a2.tar.gz
Requirement already satisfied (use --upgrade to upgrade): greenlet>=0.4.7 in /usr/lib/python3.4/site-packages (from gevent==1.1a2)
Building wheels for collected packages: gevent
Running setup.py bdist_wheel for gevent
Complete output from command /usr/bin/python -c "import setuptools;__file__='/tmp/pip-build-lfmpuicl/gevent/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" bdist_wheel -d /tmp/tmp5n4kq__mpip-wheel-:
running bdist_wheel
running build