Sade home directory hardcoded in debian preinst script
The Debian package template file preinst has the add user home directory harcoded
adduser --disabled-password  --quiet --system 
--home **/opt/sade **--no-create-home 
--gecos "[[name]]" --group [[name]]
since you can create your own sade-flavor everything will be named sade-flavor except the home directory