Updated thread about systemd warnings, errors, and breakages about the packages from obarun repo
(without systemd present... duh)

Update 5/21: after upgrading I got these "warnings"

warning: could not get file information for usr/lib/systemd/system/connman-vpn.service
warning: could not get file information for usr/lib/systemd/system/connman.service
warning: could not get file information for usr/lib/systemd/system/nscd.service
warning: could not get file information for usr/lib/systemd/system/git-daemon.socket
warning: could not get file information for usr/lib/systemd/system/git-daemon@ .service
warning: could not get file information for usr/lib/systemd/system/avahi-daemon.service
warning: could not get file information for usr/lib/systemd/system/avahi-daemon.socket
warning: could not get file information for usr/lib/systemd/system/avahi-dnsconfd.service
warning: could not get file information for usr/lib/systemd/system/krb5-kadmind.service
warning: could not get file information for usr/lib/systemd/system/krb5-kdc.service
warning: could not get file information for usr/lib/systemd/system/krb5-kpropd.service
warning: could not get file information for usr/lib/systemd/system/krb5-kpropd.socket
warning: could not get file information for usr/lib/systemd/system/krb5-kpropd@ .service
warning: could not get file information for usr/lib/systemd/system/alsa-restore.service
warning: could not get file information for usr/lib/systemd/system/alsa-state.service
warning: could not get file information for usr/lib/systemd/system/logrotate.service
warning: could not get file information for usr/lib/systemd/system/logrotate.timer
warning: could not get file information for usr/lib/systemd/system/man-db.service # 5/21
warning: could not get file information for usr/lib/systemd/system/man-db.timer
warning: could not get file information for usr/lib/tmpfiles.d/man-db.conf

warning: could not get file information for usr/lib/systemd/system/multi-user.target.wants/logrotate.timer
warning: could not get file information for usr/lib/systemd/system/multi-user.target.wants/man-db.timer # 5/21

warning: could not get file information for usr/lib/systemd/system/basic.target.wants/
warning: could not get file information for usr/lib/systemd/system/basic.target.wants/alsa-restore.service
warning: could not get file information for usr/lib/systemd/system/basic.target.wants/alsa-state.service

warning: could not get file information for usr/lib/tmpfiles.d/
warning: could not get file information for usr/lib/tmpfiles.d/nscd.conf
warning: could not get file information for usr/lib/tmpfiles.d/linux-firmware.conf

taco@ zen ~ % pacman -Qo /usr/lib/tmpfiles.d/
/usr/lib/tmpfiles.d/ is owned by connman 1.31-1
/usr/lib/tmpfiles.d/ is owned by glibc 2.22-3
/usr/lib/tmpfiles.d/ is owned by linux-firmware 20160113.40e9ae8-1
/usr/lib/tmpfiles.d/ is owned by man-db 2.7.5-1
/usr/lib/tmpfiles.d/ is owned by shadow 4.2.1-3
/usr/lib/tmpfiles.d/ is owned by sudo 1.8.15-1

taco@ zen ~ % pacman -Qo /usr/lib/systemd/*        
/usr/lib/systemd/system/ is owned by alsa-utils 1.1.0-1
/usr/lib/systemd/system/ is owned by avahi 0.6.32rc-4
/usr/lib/systemd/system/ is owned by connman 1.30-1
/usr/lib/systemd/system/ is owned by git 2.7.0-1
/usr/lib/systemd/system/ is owned by glibc 2.22-3
/usr/lib/systemd/system/ is owned by gpm 1.20.7-6
/usr/lib/systemd/system/ is owned by gssproxy 0.4.1-1
/usr/lib/systemd/system/ is owned by haveged 1.9.1-2
/usr/lib/systemd/system/ is owned by inetutils 1.9.4-2
/usr/lib/systemd/system/ is owned by krb5 1.13.2-1
/usr/lib/systemd/system/ is owned by logrotate 3.9.1-1
/usr/lib/systemd/system/ is owned by man-db 2.7.5-1
/usr/lib/systemd/system/ is owned by mdadm 3.3.4-1
/usr/lib/systemd/system/ is owned by mlocate 0.26-5 # this wasn't included but I needed it*
/usr/lib/systemd/system/ is owned by nbd 3.13-1
/usr/lib/systemd/system/ is owned by shadow 4.2.1-3
/usr/lib/systemd/system/ is owned by udevil 0.4.4-1
/usr/lib/systemd/system/ is owned by vpnc 0.5.3.svn550-1
/usr/lib/systemd/system/ is owned by wpa_supplicant 1:2.5-2

taco@ zen ~ % pacman -Qo /usr/lib/systemd/system/basic.target.wants/
/usr/lib/systemd/system/basic.target.wants/ is owned by alsa-utils 1.1.0-2

Arch Wiki wrote * = Note: Although in other distros locate and updatedb are in the findutils package, they are no longer present in Arch's package. To use it, install the mlocate package. mlocate is a newer implementation of the tool, but is used in exactly the same way. [0]

[0] https://wiki.archlinux.org/index.php/Core_utilities# locate

References:

https://www.freedesktop.org/software/systemd/man/systemd.unit.html
http://www.freedesktop.org/software/systemd/man/tmpfiles.d.html