Install this package:
emerge -a acct-user/homeassistant
If the package is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask acct-user/homeassistant
Or alternatively:
emerge --autounmask-write -a acct-user/homeassistant
<pkgmetadata> <maintainer type="person"> <email>b@edevau.net</email> <name>Andreas Billmeier</name> </maintainer> </pkgmetadata>