My personal GuixSD configuration

config.scm

(use-modules (gnu) (gnu system nss))
(use-service-modules networking desktop)
(use-package-modules admin bootloaders certs ncurses linux gnome)

(operating-system
  (host-name "gnu")
  (timezone "Europe/Madrid")
  (locale "es_ES.utf8")

  (bootloader (grub-configuration (grub grub-efi)
                                  (device "/dev/sda")))
  (file-systems (cons* (file-system
                        (device "GuixSD")
                        (title 'label)
                        (mount-point "/")
                        (type "ext4"))
                       (file-system
                        (device "/dev/sda1")
                        (mount-point "/boot/efi")
                        (type "vfat"))
                       %base-file-systems))

  (users (cons (user-account
                (name "xerz")
                (comment "Francisco Gómez")
                (group "users")
                (supplementary-groups '("wheel"
                                        "audio"
                                        "video"
                                        "cdrom"
                                        "netdev"
                                        "lp"))
                (home-directory "/home/xerz"))
           %base-user-accounts))

  (packages (cons* nss-certs
                   ncurses
                   bluez
                   gnome
                   %base-packages))

  (services (cons*
              (console-keymap-service "es")
              (bluetooth-service)
              (gnome-desktop-service)
              %desktop-services))

  (name-service-switch %mdns-host-lookup-nss))