core: gstreamer integration unable to start

The problem

When adding a gstreamer media player to the config the following error occurs: [homeassistant.components.hassio] Platform error media_player.gstreamer - No module named 'gi'

Environment

Running as supervised docker version 0.110.5 on x86_64 box with Ubuntu 20.04

• Home Assistant Core release with the issue: 0.110.5
• Last working Home Assistant Core release (if known):
• Operating environment (Home Assistant/Supervised/Docker/venv): Supervised
• Integration causing this issue: gstreamer
• Link to integration documentation on our website: https://www.home-assistant.io/integrations/gstreamer/

Problem-relevant configuration.yaml

media_player:
  - platform: gstreamer
    pipeline: "audioresample ! audioconvert ! audio/x-raw,rate=48000,channels=2,format=S16LE ! wavenc ! filesink location=/tmp/snapcast_gstreamer"

Traceback/Error logs

ERROR (MainThread) [homeassistant.components.hassio] Platform error media_player.gstreamer - No module named 'gi'

Additional information

I know the gstreamer integration requires a few additional packages but the consensus from the discord channel is that the docker image should already have everything that’s needed. For that reason, I did not run the commands on the documentation page as they seem like they are for other patforms.