nixos gtk.iconCache.enable: default from xserver.enable

It's a quick approximation to unblock unstable channels after #48116.
This commit isn't ideal, as I suspect most wayland users won't have
xserver.enable, so they will lose the icon cache in case they had gtk
in system path (otherwise they didn't get cache anyway).

I considered using environment.noXlibs, but the nixos tests installing
headless systems do *not* get that option, so we would still be pulling
gtk in many cases where it's clearly not desired.  We need to design
this more carefully.

1 files changed, 1 insertions, 1 deletions

diff --git a/nixos/modules/config/gtk/gtk-icon-cache.nix b/nixos/modules/config/gtk/gtk-icon-cache.nix
index d4e0cf97c66..9c5d993b9c5 100644
--- a/nixos/modules/config/gtk/gtk-icon-cache.nix
+++ b/nixos/modules/config/gtk/gtk-icon-cache.nix
@@ -5,7 +5,7 @@ with lib;
   options = {
     gtk.iconCache.enable = mkOption {
       type = types.bool;
-      default = true;
+      default = config.services.xserver.enable;
       description = ''
         Whether to build icon theme caches for GTK+ applications.
       '';