Download ROOT sources, strip and patch them:

  $ python setup.py egg_info
  $ python create_src_directory.py

Build wheel (optional: use --keep-temp during development):

  $ MAKE_NPROCS=32 python setup.py bdist_wheel

Build source distribution:

  $ python setup.py sdist

Sign:

  $ gpg --detach-sign -a dist/*cppyy*.tar.gz

