Remote Interpreter from Docker doesn't work anymore

I've got the following setup:

1. MacOS with Docker 17.03.01-ce-mac12

PyCharm 2017.1.4

2. Docker Image:

Based on Ubuntu 16.04, installed python3 packages, setup a virtual environment inside the container with

RUN virtualenv -p python3 --system-site-packages /pyenv
ENV VIRTUAL_ENV="/pyenv" PATH="/pyenv/bin:$PATH", 

Installed all python modules in the virtualenv

3. Added a remote interpreter from this docker image 

After updating the requirements.txt and rebuilding the docker image, PyCharm didn't list the packages anymore. Seems to be related with setuptools 36.0.1, after switching back to 35.0.2 everything worked again. Is this a PyCharm bug?