Failed to start: No module named pkg_resources

[Niehztog]

On latest Debian 9.0 Stretch, I get the followimng error when launching blockify-ui from the command line:

/usr/local/bin/blockify-ui
Traceback (most recent call last):
  File "/usr/local/bin/blockify-ui", line 6, in <module>
    from pkg_resources import load_entry_point
ImportError: No module named 'pkg_resources'

I tried re-running the setup script for setuptools:
wget https://bootstrap.pypa.io/ez_setup.py -O - | sudo python
as well as reinstalling pkg-resources:
sudo apt-get install --reinstall python-pkg-resources

No success. Please help