> Authorization required, but no authorization protocol specified Actually, mine only said "No protocol specified" making it vague, yours at least hint at something to investigate. Googling around shows people don't seem to know what they are doing and afraid to dig into X internals, so most posts are just cargo-culting and trying random stuff. Sadly, I'm in that group, so lets just randomly try stuff:
$ echo $XAUTHORITY /run/user/1000/gdm/Xauthority which stores some magic cookie, so lets add --expose=$XAUTHORITY --preserve='^XAUTHORITY$' standing ovation, everyone congratulates everyone, noone really understands what just happened I guess manual needs to be updated, or maybe guix shell --container Scheme code. Dunno Thank you very much for that STDERR hint
