Arch Linux

mkarchroot /tmp/t2 base
==> Creating group 'sys' with GID 3.
Creating group 'mem' with GID 8.
Creating group 'ftp' with GID 11.
Creating group 'mail' with GID 12.
Creating group 'log' with GID 19.
Creating group 'smmsp' with GID 25.
Creating group 'proc' with GID 26.
Creating group 'games' with GID 50.
Creating group 'lock' with GID 54.
Creating group 'network' with GID 90.
Creating group 'floppy' with GID 94.
Creating group 'scanner' with GID 96.
Creating group 'power' with GID 98.
Creating group 'nobody' with GID 65534.
Creating group 'adm' with GID 999.
Creating group 'wheel' with GID 998.
Creating group 'utmp' with GID 997.
Creating group 'audio' with GID 996.
Creating group 'disk' with GID 995.
Creating group 'input' with GID 994.
Creating group 'kmem' with GID 993.
Creating group 'kvm' with GID 992.
Creating group 'lp' with GID 991.
Creating group 'optical' with GID 990.
Creating group 'render' with GID 989.
Creating group 'sgx' with GID 988.
Creating group 'storage' with GID 987.
Creating group 'tty' with GID 5.
Creating group 'uucp' with GID 986.
Creating group 'video' with GID 985.
Creating group 'users' with GID 984.
Creating group 'systemd-journal' with GID 983.
Creating group 'rfkill' with GID 982.
Creating group 'bin' with GID 1.
Creating user 'bin' (n/a) with UID 1 and GID 1.
Creating group 'daemon' with GID 2.
Creating user 'daemon' (n/a) with UID 2 and GID 2.
Creating user 'mail' (n/a) with UID 8 and GID 12.
Creating user 'ftp' (n/a) with UID 14 and GID 11.
Creating group 'http' with GID 33.
Creating user 'http' (n/a) with UID 33 and GID 33.
Creating user 'nobody' (Kernel Overflow User) with UID 65534 and GID 65534.
Creating group 'dbus' with GID 81.
Creating user 'dbus' (System Message Bus) with UID 81 and GID 81.
Creating group 'systemd-coredump' with GID 981.
Creating user 'systemd-coredump' (systemd Core Dumper) with UID 981 and GID 981.
Creating group 'systemd-network' with GID 980.
Creating user 'systemd-network' (systemd Network Management) with UID 980 and GID 980.
Creating group 'systemd-oom' with GID 979.
Creating user 'systemd-oom' (systemd Userspace OOM Killer) with UID 979 and GID 979.
Creating group 'systemd-journal-remote' with GID 978.
Creating user 'systemd-journal-remote' (systemd Journal Remote) with UID 978 and GID 978.
Creating group 'systemd-journal-upload' with GID 977.
Creating user 'systemd-journal-upload' (systemd Journal Upload) with UID 977 and GID 977.
Creating group 'systemd-resolve' with GID 976.
Creating user 'systemd-resolve' (systemd Resolver) with UID 976 and GID 976.
Creating group 'systemd-timesync' with GID 975.
Creating user 'systemd-timesync' (systemd Time Synchronization) with UID 975 and GID 975.
Creating group 'tss' with GID 974.
Creating user 'tss' (tss user for tpm2) with UID 974 and GID 974.
Creating group 'uuidd' with GID 68.
Creating user 'uuidd' (n/a) with UID 68 and GID 68.
Failed to copy permissions from /etc/group to /etc/.#groupd783a8fa5609cac3: No such file or directory


and resulting
cat /tmp/t2/etc/passwd
root:x:0:0::/root:/bin/bash