$ lutris
Traceback (most recent call last):
  File "/usr/bin/lutris", line 33, in <module>
    from lutris.gui.application import Application
  File "/usr/lib/python3.6/site-packages/lutris/gui/application.py", line 32, in <module>
    from lutris.config import check_config
  File "/usr/lib/python3.6/site-packages/lutris/config.py", line 7, in <module>
    import yaml
ModuleNotFoundError: No module named 'yaml'