We are in the progress of splitting the RPython Toolchain from PyPy and merged the split-rpython branch into default. Existing code needs to be changed, usually just import renames. Most importantly: pypy.annotation -> rpython.annotator pypy.objspace.flow -> rpython.flowspace pypy.jit -> rpython.jit pypy.rlib -> rpython.rlib pypy.rpython -> rpython.rtyper pypy.translator -> rpython.translator Other changes: - py.py is now called pyinteractive.py. - pypy.module.signal.interp_signal is now rpython.rlib.rsignal - autopath.py has been killed I hope I didn't break your code too much! - Alexander Hesse (Aquana)