cffi<2,>=1

[:python_version == "3.6"]
scipy<2,>=1
numpy<2,>=1

[:python_version >= "3.7" and python_version < "3.11"]
scipy<2.0,>=1.6
numpy<2.0,>=1.20

[mpi]
mpi4py<4,>=3

[test]
pytest<7,>=6
