-[x] `z3` needs a dependency on `py-setuptools`
-[x] `z3` has a run dependency on `python`, so we might as well make
building with the python bindings default
-[x] `z3` needs a dependency on `py-setuptools`
-[x] `z3` has a run dependency on `python`, so we might as well make
building with the python bindings default