Installed font does not appear in xfontsel on a Guix System

After installing font-terminus on my Guix System the font appears in the output of fc-list ... /home/rovanion/.guix-profile/share/fonts/terminus/ter-x12n.pcf.gz: Terminus:style=Regular ... /run/current-system/profile/share/fonts/terminus/ter-x14n.pcf.gz: Terminus:style=Regular ... but is not selectable in xfontsel nor can urxvt find it when specified as URxvt*font: -*-terminus-medium-r-*-*-13-*-*-*-*-*-*-* I have tried installing all three outputs, font-terminus, font-terminus:pcf-8bit and font-terminus:otb but to no avail. Using xset q I can see that the Font Path does not seem to include anything about terminus. Is there some magic that's missing from Guix or some understanding that's missing from my side?