Failed with error code 1 in /tmp/pip-build-U_9LbZ/numpy/

[earcz]

Hi guys,

When building docker image, there occurred error as below.

As I understand, it is related to numpy setup. But I could not figure out how to solve. I commented python-numpy command line and locked numpy with pip install 'numpy==1.13.1' --force reinstall in Dockerfile as mentioned in matplotlib issue #91. It did not solve my problem. I also upgraded pip as @Alexey-Kamenev mentioned. But I still have the same problem.

How can I solve this problem ?