Makechroot trouble - GPGME error: Inappropriate ioctl for device

Question

Hi everybody!
I'm currently trying out several DEs with Arch and would like to build Trinity, R14, too. I followed the wiki (which more or less points to this readme).
Things are a bit tricky there, but I ended up with having the tar.gz archives built and moved to the right location as well as placing all the other stuff into the dirs made for it.
Step 4 set up a new chroot for me and everything was well except for a warning that there was no local.db. Since the scripts don't seem to build 'hal-info', 'hal' and 'libutempter', I build packages for them by hand and moved those into $chroot/root/repo. Then I used repo-add local.db.tar.gz $pkgname for each package.
Finally I updated the chroot using mkarchroot -u $chroot/root". It worked well and now I do have a file 'local.db'.
But if I want to build the first package ('tqt3') using the 'bt.sh' script, it works up to the moment where it issues 'sudo makechrootpkg -r /home/myusername/chroot -u'. Pacman starts downloading the dependencies before building, but once it's done with "checking package integrity", I just get several lines of
error: GPGME error: Inappropriate ioctl for device
and than a bunch of lines talling me that $pkgname is "missing required signature".
I'm rather new to Arch and despite having searched the wiki, the forums and google for a while, I'm not really going anywhere. I understand that it's pacman which is unable to cope with the signature thing in the chroot. But what to do about this?

Answer 1

Thanks for your answer, cmb!
My problem was solved in an unexpected way, though: Just a few days after I had given up on getting building the Trinity DE myself, someone set up a custom repo for it that was added to the wiki. This was of course by far the easiest solution. But it was also good to mess a little with the build system myself.