@raven-worx Hi. I did specifically have all the nss I could find installed, but still failed the Qt5 v5.15.2 build.
Here's what zypper lists:
Name : libnss_slurm2-debuginfo
Name : libnss_nis2
Name : libnss_nis2-32bit
Name : libnss_slurm2
Name : libnss_usrfiles2
Name : libnss_usrfiles2-32bit
Name : libnsssharedhelper0
Name : libnsssharedhelper0-32bit
localhost:/home/owner # cat nss-comment
owner@localhost:~> sudo zypper info nss | grep Name
Looking specifically for "nss" shows 50 items, but not strictly "libnss"
Name : libKF5DNSSD5
Name : libKF5DNSSD5-lang
Name : libxmlsec1-nss1
Name : mozilla-nss
Name : mozilla-nss-certs
Name : nss-mdns
Name : nss-mdns-32bit
Name : libnss_slurm2-debuginfo
Name : libvirt-nss-debuginfo
Name : mozilla-nss-32bit-debuginfo
Name : mozilla-nss-certs-32bit-debuginfo
Name : mozilla-nss-certs-debuginfo
Name : mozilla-nss-debuginfo
Name : mozilla-nss-debugsource
Name : mozilla-nss-sysinit-32bit-debuginfo
Name : mozilla-nss-sysinit-debuginfo
Name : mozilla-nss-tools-debuginfo
Name : nss-myhostname-32bit-debuginfo
Name : nss-myhostname-debuginfo
Name : nss-mymachines-32bit-debuginfo
Name : nss-mymachines-debuginfo
Name : nss-systemd-debuginfo
Name : apache2-mod_nss
Name : libnss_nis2
Name : libnss_nis2-32bit
Name : libnss_slurm2
Name : libnss_usrfiles2
Name : libnss_usrfiles2-32bit
Name : libnsssharedhelper0
Name : libnsssharedhelper0-32bit
Name : mozilla-nss-32bit
Name : mozilla-nss-certs-32bit
Name : mozilla-nss-devel
Name : mozilla-nss-sysinit
Name : mozilla-nss-sysinit-32bit
Name : mozilla-nss-tools
Name : nss-myhostname
Name : nss-myhostname-32bit
Name : nss-mymachines
Name : nss-mymachines-32bit
Name : nss-pam-ldapd
Name : nss-pam-ldapd-32bit
Name : nss-shared-helper-devel
Name : nss-systemd
Name : nss_ldap
Name : nss_ldap-32bit
Name : nss_wrapper
Name : python2-nss
Name : python3-nss
Name : xmlsec1-nss-devel
but even searching on the build opensuse page for libnss fails to turn it up specifically. See https://build.opensuse.org/search?search_text=libnss, so I am left to guess whether or not the nss package which Qt5 expects to find has been provided by the openSuse repositories.