diff --git a/modules/home/default.nix b/modules/home/default.nix
index bc3a5ebfd3c15f9d93ab6737cf29b830661a7fa6..997ad2406a696cae358364b543c027167279e82d 100644
--- a/modules/home/default.nix
+++ b/modules/home/default.nix
@@ -19,7 +19,7 @@ in
   options = {
     programs.ghostty.shader = lib.mkOption {
       type = lib.types.str;
-      default = { };
+      default = "";
       description = "set the ghostty shader, relative to 'files/ghostty'";
     };
     programs.android-sdk.enable = lib.mkOption {