[Zope] Install Error

I can't seem to resolve this error. Does anyone have a hint? Thanks ./install 'import site' failed; use -v for traceback Traceback (most recent call last): File "inst/binary_install.py", line 20, in ? import sys, os, getopt ImportError: No module named os version = Zope-2.6.1-solaris-2.8-sparc OS = Solaris 9