Removing prop-inputs

[brettg]

Hi all, this is my system configuration file. I am trying to remove 
nautilus and epiphany from the gnome-desktop-service that gets loaded. 
So far I am not having any luck. Any ideas?

(use-modules (gnu) (gnu system nss) (srfi srfi-1) (guix packages) (ice-9 
match))
(use-service-modules desktop xorg)
(use-package-modules certs gnome)

(define-public gnome-custom
  (package
   (inherit gnome)
   (name "gnome-custom")
   (propagated-inputs (remove
                       (match-lambda
                         ;; Ignore the second value.
                         ((name _)
                          (string=? name "nautilus")
                          (string=? name "epiphany")))
                          (package-propagated-inputs gnome)))))

(operating-system
  (host-name "guixsd")
  (timezone "America/Chicago")
  (locale "en_US.utf8")

  ;; Use the UEFI variant of GRUB with the EFI System
  ;; Partition mounted on /boot/efi.
  (bootloader (bootloader-configuration
                (bootloader grub-efi-bootloader)
                (target "/boot/efi")))

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

  (users (cons (user-account
                (name "brettg")
                (comment "Brett Gilio")
                (group "users")
                (supplementary-groups '("wheel" "netdev"
                                        "audio" "video"))
                (home-directory "/home/brettg"))
               %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
  ;; NetworkManager, and more.
  (services (cons* (service gnome-desktop-service-type
                            (gnome-desktop-configuration
                             (inherit config)
                             (gnome-package gnome-custom)))
                   %desktop-services))

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