For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:dheidler:zellij/openSUSE_Tumbleweed/home:dheidler:zellij.repo
zypper refresh
zypper install wasi-libc
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:dheidler:zellij/15.6/home:dheidler:zellij.repo
zypper refresh
zypper install wasi-libc
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:dheidler:zellij/15.5/home:dheidler:zellij.repo
zypper refresh
zypper install wasi-libc