unbound logging on Archlinux

[ѽ҉ᶬḳ℠]

> It is not chrooted but running in an unprivileged LXC container, though
> that should not make a difference for Unbound writing its log inside the
> container, or should it perhaps?

Have tried the below variations and each is met with the same outcome ->
error: Could not open logfile /var/log/unbound.log: No such file or
directory

1. no file unbound.log in /var/log and thus expecting unbound to create it
2. created file unbound.log in /var/log manually with mask 0755
3. set logfile: "/var/log/unbound.log"
4. set logfile: /var/log/unbound.log