setup.py

import sys, re, os

try:
    from skbuild import setup
    import pybind11
except ImportError:
    print("The preferred way to invoke 'setup.py' is via pip, as in 'pip "
          "install .'. If you wish to run the setup script directly, you must "
          "first install the build dependencies listed in pyproject.toml!",
          file=sys.stderr)
    raise

setup(
    packages=['gco'],
    package_dir={'': 'src'},
    cmake_install_dir='src/gco'
)