--- memory/build/zone.c.orig
+++ memory/build/zone.c
@@ -340,7 +340,6 @@
   // malloc_default_purgeable_zone is called beforehand so that the
   // default purgeable zone is created when the default zone is still
   // a scalable_zone.
-  malloc_zone_t* purgeable_zone = malloc_default_purgeable_zone();
 
   // There is a problem related to the above with the system nano zone, which
   // is hard to work around from here, and that is instead worked around by
@@ -370,8 +369,6 @@
     // On OSX >= 10.6, unregistering replaces the purgeable zone with the last
     // registered zone above, i.e the default zone. Registering it again then
     // puts it at the end, obviously after the default zone.
-    malloc_zone_unregister(purgeable_zone);
-    malloc_zone_register(purgeable_zone);
     default_zone = get_default_zone();
   } while (default_zone != &zone);
 }