# Note: depends on pkg-config
# Note: depends on libffi
# Note: depends on Python
# Note: depends on python-cffi
# Note: depends on python-asn1crypto
# Note: depends on openssl
# Note: depends on python-six
# Note: depends on python-ipaddress for Python2
# Note: depends on python-enum34 for Python2
wget -c https://github.com/pyca/cryptography/archive/2.8/cryptography-2.8.tar.gz
tar -xzf cryptography-2.8.tar.gz
cd cryptography-2.8
python3 setup.py build
python3 setup.py install # as root
if which python2; then
  python2 setup.py build
  python2 setup.py install # as root
fi