IOError: [Errno 2] No such file or directory: '/tmp/pip-1kNNWK-build/setup.py'

When you install TensorFlow, you might encounter the following error:

IOError: [Errno 2] No such file or directory: '/tmp/pip-1kNNWK-build/setup.py'

Upgrade your `pip` as follows:

pip install --upgrade pip

Reference:
https://www.tensorflow.org/versions/0.6.0/get_started/os_setup.html#common_install_problems