wget https://files.pythonhosted.org/packages/cb/da/54a5d7a7d9afc90036d21f4b58229058270cc14b4c81a86d9b2c77fd072e/Cython-0.29.28.tar.gz

tce-load -i compiletc python3.9-dev

cd Cython-0.29.28

patch Makefile tcflags.patch