boot/lib/lvgui: fix libxkbcommon after nixpkgs#108004
@@ -70,6 +70,7 @@ let
"-Denable-wayland=false"
"-Denable-x11=false"
"-Denable-docs=false"
+ "-Denable-xkbregistry=false"
# This is because we're forcing uses of this build
# to define config and locale root; for stage-1 use.
