No dvorak in window manager

[Luther Thompson]

I installed GuixSD today. When I boot up, both the login manager and
the desktop session use qwerty. I do see dvorak when I hit Ctrl+Alt+F2
for a non-window console. `loadkeys dvorak` has no effect in either
place. Here is my OS definition:

(use-modules (gnu) (gnu system nss))
(use-service-modules desktop)
(use-package-modules certs gnome)

(operating-system
  (host-name "targaryen")
  (timezone "America/New_York")
  (locale "en_US.utf8")

  (bootloader (bootloader-configuration
                (bootloader grub-bootloader)
                (target "/dev/sda")))

  (file-systems (cons (file-system
                        (device "my-root")
                        (mount-point "/")
                        (type "ext4")
(title 'label))
                      %base-file-systems))

  (users (cons (user-account
                (name "luther")
                (comment "Luther Thompson")
                (group "users")
                (supplementary-groups '("wheel" "netdev"
                                        "audio" "video"))
                (home-directory "/home/luther"))
               %base-user-accounts))

  ;; This is where we specify system-wide packages.
  (packages (cons* nss-certs         ;for HTTPS access
                   gvfs              ;for user mounts
                   %base-packages))

  ;; Add GNOME and/or Xfce---we can choose at the log-in
  ;; screen with F1.  Use the "desktop" services, which
  ;; include the X11 log-in service, networking with Wicd,
  ;; and more.
  (services (cons* (console-keymap-service "dvorak")
  (gnome-desktop-service)
                   (xfce-desktop-service)
                   %desktop-services))

  ;; Allow resolution of '.local' host names with mDNS.
  (name-service-switch %mdns-host-lookup-nss)

  (swap-devices '("/swapfile")))

-- 
Luther Thompson