keras_activate.sh:2: = not found message with virtualenv

[fonnesbeck]

I have keras installed in a virtual environment (using Anaconda). Each time I switch to the virtualenv, I get the following error:

~/anaconda3/envs/dev/etc/conda/activate.d/keras_activate.sh:2: = not found

I can verify that keras imports into Python after switching to the environment, so I'm not sure what the message is all about. The file contains the following:

#!/bin/bash
if [ "$(uname)" == "Darwin" ]
then
    # for Mac OSX
    export KERAS_BACKEND=tensorflow
elif [ "$(uname)" == "Linux" ]
then
    # for Linux
    export KERAS_BACKEND=theano
fi

I'm running keras 2.0.9 on macOS under Python 3.6.1.