# Note: depends on pkg-config
# Note: depends on libffi
# Note: depends on Python
# Note: depends on setuptools
wget -c https://github.com/pallets/click/archive/7.0/click-7.0.tar.gz
tar -xzf click-7.0.tar.gz
cd click-7.0
python3 setup.py build
python3 setup.py install # as root