Hello,
 I am using:
guix-system-install-1.0.0.x86_64-linux.iso
Dell Latitude E5500
ATA Hitache HTS72328 (scsi) /dev/sda 80GB disk
wired ethernet 00219be81197 cable
Graphical install
Bottom line error message: ice-9/eval.scm:159:9: Unable to locate keymap
update file
Some hopefully useful screen shots attached.
Thanks
Mortimer