gerbera from home:osw3 project

Sty agraw n unessmres nnek/m

For openSUSE Leap 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:osw3/openSUSE_Leap_15.5/home:osw3.repo
zypper refresh
zypper install gerbera