openrc and python venv

Hi,

     On an openrc system I am manually starting an instance of 
homeassistant installed in a python venv.

The process is:

login as the homeassistant user, set the PATH and activate the venv 
before running the application.

e.g.
export 
PATH="${PATH}:/var/lib/homeassistant:/var/lib/homeassistant/bin:/var/lib/homeassistant/.local/bin
source /var/lib/homeassistant/bin/activate
./bin/hass

I tried to get it to start using an openrc service file a few months 
back and failed.  Can this be done in a service file?