Cython 3.1.0 build fails due to "'long' is not a constant, variable or function identifier"

[jessezhang91]

Exact same issue as: escherba/python-metrohash#29

Current workaround with uv, in pyproject.toml add:

[tool.uv]
build-constraint-dependencies = ["Cython<3.1.0"]

[escherba]

addressed in #96 , wheels should be available within an hour or two