requirements.txt install fails with numpy.distutils.core import error

[fbessho]

pip install -r requirements.txt fails with the error on Max OS X.

pip install -r requirements.txt

...

        from numpy.distutils.core import setup

    ImportError: No module named numpy.distutils.core

    ----------------------------------------
    Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/3s/7v9d19q90752p8_nqzxj4cg80000gn/T/pip-build-MKi69E/pyamg

Current workaround is to install numpy independently before running pip install -r requirements.txt

pip install numpy==1.8.1

[fbessho]

Related issue in github
scipy/scipy#3379
scipy/scipy#465

[fbessho]

Kinda resolved by 0.2.1 release (#24)
pip install should work without this issue.