# Note: depends on Python
wget -c https://pypi.python.org/packages/f4/bd/0467d62790828c23c47fc1dfa1b1f052b24efdf5290f071c7a91d0d82fd3/idna-2.6.tar.gz
tar -xzf idna-2.6.tar.gz
cd idna-2.6
python3 setup.py build
python3 setup.py install # as root