[build-system]
# Must be kept in sync with `setup_requirements` in `setup.py`
requires = [
    "setuptools>=40.8.0",
    "wheel",
    "cffi>=1.1; python_implementation != 'PyPy'",
]
# Point to the setuptools' PEP517 build backend explicitly to
# disable Pip's fallback guessing
build-backend = "setuptools.build_meta"