For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ptrommler:eiger/15.6/home:ptrommler:eiger.repo
zypper refresh
zypper install rpmconf
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ptrommler:eiger/15.5/home:ptrommler:eiger.repo
zypper refresh
zypper install rpmconf
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ptrommler:eiger/15.4/home:ptrommler:eiger.repo
zypper refresh
zypper install rpmconf
For 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ptrommler:eiger/15.3/home:ptrommler:eiger.repo
zypper refresh
zypper install rpmconf