A Murder of Crows?

What version of PyBox2D does A Murder Of Crows need?

I installed the latest one (2.0.2b1) and I get this:

Traceback (most recent call last):
  File "run_game.py", line 3, in <module>
    from gamelib import main
  File "/Local/Games/Python/PyWeek9/a murder of crows/gamelib/main.py", line 3, in <module>
    import menucontext
  File "/Local/Games/Python/PyWeek9/a murder of crows/gamelib/menucontext.py", line 1, in <module>
    from mapcontext import MapContext
  File "/Local/Games/Python/PyWeek9/a murder of crows/gamelib/mapcontext.py", line 4, in <module>
    from crow import Murder, Crow
  File "/Local/Games/Python/PyWeek9/a murder of crows/gamelib/crow.py", line 6, in <module>
    import physics
  File "/Local/Games/Python/PyWeek9/a murder of crows/gamelib/physics.py", line 6, in <module>
    print box2d.b2_maxPairs
AttributeError: 'module' object has no attribute 'b2_maxPairs'