Building wt yields the following warning:

==> WARNING: backup entry file not in package : etc/wt/wt_config.xml

This seems to be caused by [1] which moves /etc/wt/wt_config.xml to /etc/wt_config.xml.

This change was made for #46972 [2] which was fixed later upstream [3].
CONFIGDIR now defaults to /etc/wt again instead of /usr/etc/wt.

I don't know where the proper location is for configfiles, /etc or /etc/<packagename>.
Upstream suggests /etc/wt.

I believe these are our options:
1) Removing -DCONFIGDIR=/etc and using the default, /etc/wt.
2) Changing -DCONFIGDIR to /etc/wt to prevent the warning from returning in case upstream changes the default again.
3) Changing backup=('etc/wt/wt_config.xml') to backup=('etc/wt_config.xml').

Side note: upstream's username has changed from "kdeforche" to "emweb".
github.com/kdeforche/wt redirects to github.com/emweb/wt, but I don't know if it will stay that way.

I hope I reported this in time for the update to 3.3.8-1.

[1]: https://git.archlinux.org/svntogit/community.git/commit/trunk?h=packages/wt&id=b396a18813816c5d6ed6df3ebaf404a239326241
[2]: https://bugs.archlinux.org/task/46972
[3]: https://github.com/emweb/wt/commit/980b62ed7e8555ab6c155367cc60900f875e63ed#diff-af3b638bc2a3e6c650974192a53c7291