openSUSE Tumbleweed is in progress of updating to glibc 2.32 (needed for
SELinux 3.1)

Currently, i-i fails to build with a report like:

[  332s] adding package ca-certificates-mozilla [2.42-4.2.noarch]
{postin,postun}
[  332s] running "cp -a /etc/ssl etc"
[  333s] running "cp -a /var/lib/ca-certificates var/lib"
[  333s] cp: setting permissions for 'var/lib/ca-certificates/pem': Operation
not supported
[  333s] cp: setting permissions for 'var/lib/ca-certificates/openssl':
Operation not supported
[  333s] mk_image: execution of "cp -a /var/lib/ca-certificates var/lib" failed
at lib/AddFiles.pm line 796 in data/initrd/initrd.file_list line 587.
[  333s] make: *** [Makefile:89: initrd] Error 255

This was tracked down to glibc changes like the one in commit
https://github.com/bminor/glibc/blob/87a698a21646b7ee620923ef5ffa9735471a8ddd/sysdeps/unix/sysv/linux/fchmodat.c#L92

(strace revealed ENOENT, glibc raised it to EOPNOTSUPP)

The issue seems to be that /proc is not mounted at this stage