I'm trying to install some package on linux from
read-only storage (pex, CD-ROM), and process has been
crashed. After copying first file from build/lib
directory I have error message.

I run setup script with command:

python setup.py install --skip-build -f --no-compile

Directory build/lib contain builded python scripts (and
extensions). If I try to install from hard disk -- all
OK. If try to install from read-only devices -- process
breaked.

I have this error message:

error:
/usr/lib/python2.4/site-package/module/__init__.py:
Invalid argument

Error message appear after successful copying file
__init__.py.

If copying directory with all files to install from
CD-ROM to hard drive and then launch setup.py, then it
is works fine.

Tested on:
* linux2 + python 2.3
* cygwin + python 2.4

On windows it is works OK.