git clone --depth 1 -b v3.9.0 https://github.com/python/cpython
cd cpython
git checkout v3.9.0

docker pull wolframalph/cpython-env
docker run --rm -d --name=cpython --volume=$(pwd):/workspaces/cpython -w /workspaces/cpython --platform=linux/amd64 wolframalph/cpython-env sleep infinity
docker exec -it cpython /bin/bash

git clone https://github.com/WolframAlph/pointers-in-python
cp -r pointers-in-python/patches/ patches
rm -rf pointers-in-python/

./configure --with-pydebug
make -j