Install this package:
emerge -a acct-user/homeassistant
<pkgmetadata> <maintainer type="project"> <email>tabascoz@gmail.com</email> <name>Fernando Cunha</name> </maintainer> <upstream> <remote-id type="pypi">homeassistant</remote-id> <remote-id type="github">home-assistant/core</remote-id> </upstream> </pkgmetadata>