Note: Sorry friends, I pressed the wrong reply button (private reply). Now, I'm replyng to the bugs mailing list.
I'm running Guix on a foreign distribution, and $PYTHONPATH is unset. The foreign distribution in question is Trisquel 7 (which is based on the Ubuntu 14.04). I'll read some documentation on which part of my Guix installation I should set $PYTHONPATH to. I'll reply back when done experimenting. Note: If I'm not mistaken, there was no advise to set $PYTHONPATH to anything by the documentation (at least not for dailly/normal use) or by Guix itself (during installation of Scribus).
