calamares from home:sb56637:geckolinux:static project
Select Your Operating System
Add repository and install manually
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:sb56637:geckolinux:static/15.4/home:sb56637:geckolinux:static.repo zypper refresh zypper install calamares