Packages that are mentionned there are installed in a way that bypasses
pip:
https://pip.pypa.io/en/stable/user_guide/?highlight=setup_requires#installation-bundles

These prefixes were visible, for example when invoking
"./setup.py --help build".

Christoph Groth authored 9 years ago and Anton Akhmerov committed 9 years ago

Co-authored by Anton Akhmerov <anton.akhmerov@gmail.com>

I try to cleanly separate between information that should be part of the
Kwant source distribution (that is tied to a particular version of
Kwant), and generic information that is best presented on the website.