Cython error: Lua "undeclared name not builtin: long"

[waarmond]

ArchLinux, Python 3.10, Cython 3.0.10 (0.29.36 didn't got accepted)

Error compiling Cython file:
------------------------------------------------------------
...
        args = cpython.tuple.PyTuple_New(length)
        lua.lua_pushnil(L)            # nil (first key)
        while lua.lua_next(L, -2):    # key value
            key = py_from_lua(runtime, L, -2)
            value = py_from_lua(runtime, L, -1)
            if isinstance(key, (int, long)) and not isinstance(key, bool):
                                     ^
------------------------------------------------------------

lupa/lua51.pyx:752:37: undeclared name not builtin: long

I don't have lua51 installed on my system; this is the bundled version.

PS: Building 1.14.1 against cython 0.29.36 works.