Description:
updatedb.timer cannot be enabled as it's missing an Install section.

Needs this:

[Install]
WantedBy=timers.target


Additional info:
* mlocate 0.26-6

* systemctl output:
~ ❯❯❯ sudo systemctl enable updatedb.timer
The unit files have no installation config (WantedBy, RequiredBy, Also, Alias
settings in the [Install] section, and DefaultInstance for template units).
This means they are not meant to be enabled using systemctl.
Possible reasons for having this kind of units are:
1) A unit may be statically enabled by being symlinked from another unit's
.wants/ or .requires/ directory.
2) A unit's purpose may be to act as a helper for some other unit which has
a requirement dependency on it.
3) A unit may be started when needed via activation (socket, path, timer,
D-Bus, udev, scripted systemctl call, ...).
4) In case of template units, the unit is meant to be enabled with some
instance name specified.