python3-mesonpy (Meson Python build backend, PEP517)

meson-python is a Python build backend built on top of the Meson build
system. It enables to use Meson for the configuration and build steps
of Python packages.

NOTE: Does not work with the stock 15.0 meson.

PYTHONPATH needs to be set to use python3-meson-opt.

  export PYTHONPATH=/opt/python3.9/site-packages/