diff --git a/gui.rkt b/gui.rkt
index b88a01c..7fbf495 100644
--- a/gui.rkt
+++ b/gui.rkt
@@ -126,15 +126,14 @@
   (if (number? v) (exact->inexact v) v))
 
 (actor #:name 'layout-driver
-       (during/actor (observe (layout-solution $container-id (horizontal-layout _) _ _))
-                     #:name (list 'horizontal-layout container-id)
-                     (solve-hv-layout #f container-id))
-       (during/actor (observe (layout-solution $container-id (vertical-layout _) _ _))
-                     #:name (list 'vertical-layout container-id)
-                     (solve-hv-layout #t container-id))
-       (during/actor (observe (layout-solution $container-id (tabular-layout _ _) _ _))
-                     #:name (list 'tabular-layout container-id)
-                     (solve-tabular-layout container-id)))
+       (during/actor (observe (layout-solution $container-id _ _ _))
+         #:name (list 'layout container-id)
+         (stop-when (asserted (observe (layout-solution container-id (horizontal-layout _) _ _)))
+                    (react (solve-hv-layout #f container-id)))
+         (stop-when (asserted (observe (layout-solution container-id (vertical-layout _) _ _)))
+                    (react (solve-hv-layout #t container-id)))
+         (stop-when (asserted (observe (layout-solution container-id (tabular-layout _ _) _ _)))
+                    (react (solve-tabular-layout container-id)))))
 
 (define (solve-hv-layout vertical? container-id)
   (define ctor (if vertical? vertical-layout horizontal-layout))