numpy_issue_2434

cd /tmp

cat > ./setup.py <<DELIM
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Author: "Chris Ward" <cward@redhat.com>

from setuptools import setup

default_setup = dict(
    name='numpy_install_test',
    description='https://github.com/numpy/numpy/issues/2434',
    provides=['numpy_install_test'],
    install_requires=['pandas'],
    requires=['pandas'],
    license='GPLv3',
    author='Chris Ward',
    author_email='cward@redhat.com',
)   

setup(**default_setup)

DELIM


virtualenv --no-site-packages ~/virtenvs/nonumpy
source ~/virtenvs/nonumpy/bin/activate
python setup.py install

But if i just do 'pip install pandas' manually, everything works. So this might be an issue with Pandas or setuptools... but the failure is only occuring when installing numpy as a dependency (of a dependency) through install_requires director, it seems.

pip install pandas isn't quite the same dependency link, but putting this setup.py in a tmpdir and then doing pip install . works fine, so it's indeed a difference between setuptools and pip.