Hi Pauli, Thanks for looking into this. Apologies for mangling the email subject line in my previous reply. Answers are below, inline:

That is interesting, as it has worked for me on all configurations. You can check under 'build/testenv/' --- does your Python version by chance install it to a `lib64` directory instead of `lib`?

$ ls build/testenv/ bin lib64

(i)

What does

import os from distutils.sysconfig import get_python_lib get_python_lib(prefix=os.path.abspath('build/testenv'))

report? Is there a 'numpy' directory below the reported directory after running runtests.py?

...

...

import os from distutils.sysconfig import get_python_lib get_python_lib(prefix=os.path.abspath('build/testenv'))

'/ssd-space/home/X/github/numpy/build/testenv/lib/python2.7/site-packages' I'm running this in a fresh python client in the directory 'github/numpy'.

(ii)

Start a fresh Python interpreter and run

import sys print sys.modules.get('numpy')

(Note: no "import numpy" above). Does it print `None` or something else?

...

...

import sys print sys.modules.get('numpy') None

Thanks, Pauli and Stefan. Graeme.