rubygem-parallel from home:Aareon-Deutschland:Base project
Select Your Operating System
Add repository and install manually
For SLES 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Aareon-Deutschland:Base/SLES_15.6/home:Aareon-Deutschland:Base.repo zypper refresh zypper install rubygem-parallel