I have installed python-dev package on Cygwin. It seems to be better as now I am able to build wheels for collected packages: numpy
$ pip3 install numpy Collecting numpy Using cached numpy-1.12.1.zip Building wheels for collected packages: numpy Running setup.py bdist_wheel for numpy ... done Stored in directory: /cygdrive/d/ARCHITECTURE/.cache/pip/wheels/50/b5/d0/3994af801e0786dfb41a9856ddf85d69c54f233e749935d536 Successfully built numpy Installing collected packages: numpy Successfully installed numpy-1.12.1 << No issue detected also from from pip checker: $ pip3 check numpy No broken requirements found. << However, I am still not able to run my numpy sample script: (short extract) import numpy as np a = np.array([1,2,3,4]) print(a) python3 numpy_sample.py Traceback (most recent call last): File "numpy_sample.py", line 1, in import numpy as np File "/cygdrive/d/GFMWK_NEXT/base/cygwin/lib/python3.6/site-packages/numpy/init.py", line 142, in from . import add_newdocs File "/cygdrive/d/GFMWK_NEXT/base/cygwin/lib/python3.6/site-packages/numpy/add_newdocs.py", line 13, in from numpy.lib import add_newdoc File "/cygdrive/d/GFMWK_NEXT/base/cygwin/lib/python3.6/site-packages/numpy/lib/init.py", line 18, in from .polynomial import * File "/cygdrive/d/GFMWK_NEXT/base/cygwin/lib/python3.6/site-packages/numpy/lib/polynomial.py", line 20, in from numpy.linalg import eigvals, lstsq, inv File "/cygdrive/d/GFMWK_NEXT/base/cygwin/lib/python3.6/site-packages/numpy/linalg/init.py", line 51, in from .linalg import * File "/cygdrive/d/GFMWK_NEXT/base/cygwin/lib/python3.6/site-packages/numpy/linalg/linalg.py", line 29, in from numpy.linalg import lapack_lite, _umath_linalg ImportError: No such file or directory << I am not also able to find any lapack library for python, except cygwin packages below also installed: fort77 libopenblas liblapack0 liblapack-devel Then, It is not clear what is missing : other cygwin package or python3 dependency as pip checker highlights nothing missing. Thanks again for your help, -- View this message in context: http://cygwin.1069669.n5.nabble.com/Numpy-1-12-1-setup-issue-targetting-Python-3-6-1-from-Cygwin-2-8-0-tp133485p133510.html Sent from the Cygwin list mailing list archive at Nabble.com. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple