't[0:1] == os.sep' is not a valid test for an absolute pathname, those contain drive letters on Windows. This will work, and should also work on other platforms if I understand the docs for splitdrive() correctly.
else: # install_base usually is a full path; we need to # make it a relative path so it can be the second argument # to os.path.join(). t = install.install_base # on systems where a drive letter is used, split it off _, t = os.path.splitdrive(t) if t[0:1] == os.sep: t = t[1:] archive_root = os.path.join(self.bdist_dir, t)
This still isn't completely correct. To really identify an absolute pathname, you should use the os.path.isabs() function provided for that purpose: _, t = os.path.splitdrive(t) if os.path.isabs(t): t = t[1:] archive_root = os.path.join(self.bdist_dir, t) Directly examining the first character loses on some systems. Old MacOS path names use a leading separator (:) to specify a *relative* path name, for example. --SK