Message11149

Thad, could you please try the following:

in Lib/os.py

right after line 'import sys, errno' add the line
sys.platform.addtarget("pip\.compat\.*")
(Remember to delete os.py's corresponding class file, so this change finds its way into bytecode; won't work if Lib is packaged into jar!)

It should make pip detect Windows properly and thus not call getusereid on non-posix systems.
Please report back if that solves the problem, then I will include it into Jython. (I would try myself if I could reproduce the issue)

Meanwhile I will try to reproduce this error. Why do I not see it? Are you logged in as a different user than the temp-folder belongs to or something otherwise special?