How about adding a corresponding comment in the docs in the Windows section? We could say that there is a known problem with distutils on Python 2.7.9, as explained in https://bugs.python.org/issue23246, and the same problem applies whenever you want to run a compile(). We could also mention that "import setuptools" might help. (EDIT: any 2.7.x with x >= 9, actually. It seems that the bug report was closed as "not a bug" and they won't fix it. I don't even want to understand why.)
Also, maybe keep the hack when we call verify(), for backward compatibility. Otherwise, existing old code using ffi.verify() will suddenly fail with newer cffi.