in wrlinux 5.0.1 it would be good to add the --user-group parameter to the packages that create user groups for better visibility. in nfs-utils's case, it should be USERADD_PARAM_${PN}-client = "--system -d /var/lib/nfs s /bin/false --user-group rpcuser" similar to openssh_6.0p1.bb that can be viewed as a reference: 32 inherit useradd update-rc.d update-alternatives 33 34 USERADD_PACKAGES = "${PN}-sshd" 35 USERADD_PARAM_${PN}-sshd = "--system --no-create-home --home-dir /var/run/sshd --shell /bin/false --user-group sshd"
check bbappend files for various packages