=gui-apps/gtklock-2.0.1 requires >=gui-libs/gtk-layer-shell-0.6.0
however the currently stable version of gtk-layer-shell in :gentoo is
only 0.1.0. Once a version of gtk-layer-shell >= 0.6.0 gets stablised,
this commit can be reverted.
Signed-off-by: Hayley Hughes <hayley@foxes.systems>