Как установить numpy на Python 2.7 в virtualenv?

Я пытаюсь установить numpy на Python 2.7 в virtualenv (на Cygwin).
Тем не менее, когда я пытаюсь import numpyЯ получаю ImportError:

Administrator@Ron ~/python/virtualenv
$ virtualenv -p /usr/bin/python2.7.exe machine_learning
Running virtualenv with interpreter /usr/bin/python2.7.exe
New python executable in /home/Administrator/python/virtualenv/machine_learning/bin/python2.7
Also creating executable in /home/Administrator/python/virtualenv/machine_learning/bin/python
Installing setuptools, pip, wheel...done.

Administrator@Ron ~/python/virtualenv
$ source machine_learning/bin/activate
(machine_learning)
Administrator@Ron ~/python/virtualenv
$ pip2 install numpy
Collecting numpy
Installing collected packages: numpy
Successfully installed numpy-1.13.0
(machine_learning)
Administrator@Ron ~/python/virtualenv
$ python2 -c "import numpy"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/Administrator/python/virtualenv/machine_learning/lib/python2.7/site-packages/numpy/__init__.py", line 142, in <module>
    from . import add_newdocs
  File "/home/Administrator/python/virtualenv/machine_learning/lib/python2.7/site-packages/numpy/add_newdocs.py", line 13, in <module>
    from numpy.lib import add_newdoc
  File "/home/Administrator/python/virtualenv/machine_learning/lib/python2.7/site-packages/numpy/lib/__init__.py", line 19, in <module>
    from .polynomial import *
  File "/home/Administrator/python/virtualenv/machine_learning/lib/python2.7/site-packages/numpy/lib/polynomial.py", line 20, in <module>
    from numpy.linalg import eigvals, lstsq, inv
  File "/home/Administrator/python/virtualenv/machine_learning/lib/python2.7/site-packages/numpy/linalg/__init__.py", line 51, in <module>
    from .linalg import *
  File "/home/Administrator/python/virtualenv/machine_learning/lib/python2.7/site-packages/numpy/linalg/linalg.py", line 30, in <module>
    from numpy.linalg import lapack_lite, _umath_linalg
ImportError: No such file or directory
(machine_learning)
Administrator@Ron ~/python/virtualenv

Любое предложение, как установить Numpy на Python 2.7 в virtualenv?

Замечания:
Python3 Cygwin версии 3.6, и кажется, что Pypi Numpy еще не готов для 3.6.

Изменить 1:

В ответ на комментарий matzeri я удалил numpy из pip3 и pip2, и установлен numpy для Python 3 и Python 2 из файла setup.exe Cygwin.
Ниже приведены ошибки, которые я получаю для numpy, когда пытаюсь импортировать его впоследствии:

$ python3 -c "import numpy"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3.6/site-packages/numpy/__init__.py", line 142, in <module>
    from . import add_newdocs
  File "/usr/lib/python3.6/site-packages/numpy/add_newdocs.py", line 13, in <module>
    from numpy.lib import add_newdoc
  File "/usr/lib/python3.6/site-packages/numpy/lib/__init__.py", line 18, in <module>
    from .polynomial import *
  File "/usr/lib/python3.6/site-packages/numpy/lib/polynomial.py", line 20, in <module>
    from numpy.linalg import eigvals, lstsq, inv
  File "/usr/lib/python3.6/site-packages/numpy/linalg/__init__.py", line 51, in <module>
    from .linalg import *
  File "/usr/lib/python3.6/site-packages/numpy/linalg/linalg.py", line 29, in <module>
    from numpy.linalg import lapack_lite, _umath_linalg
ImportError: No such file or directory

$ python2 -c "import numpy"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python2.7/site-packages/numpy/__init__.py", line 142, in <module>
    from . import add_newdocs
  File "/usr/lib/python2.7/site-packages/numpy/add_newdocs.py", line 13, in <module>
    from numpy.lib import add_newdoc
  File "/usr/lib/python2.7/site-packages/numpy/lib/__init__.py", line 18, in <module>
    from .polynomial import *
  File "/usr/lib/python2.7/site-packages/numpy/lib/polynomial.py", line 20, in <module>
    from numpy.linalg import eigvals, lstsq, inv
  File "/usr/lib/python2.7/site-packages/numpy/linalg/__init__.py", line 51, in <module>
    from .linalg import *
  File "/usr/lib/python2.7/site-packages/numpy/linalg/linalg.py", line 29, in <module>
    from numpy.linalg import lapack_lite, _umath_linalg
ImportError: No such file or directory