sdbootutil from home:firstyear:calculus project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:firstyear:calculus/openSUSE_Tumbleweed/home:firstyear:calculus.repo zypper refresh zypper install sdbootutil