Index: src/closures.c
--- src/closures.c.orig
+++ src/closures.c
@@ -904,6 +904,7 @@ dlmmap (void *start, size_t length, int prot,
       return ptr;
     }
 
+#if 0
   /* -1 != execfd hints that we already decided to use dlmmap_locked
      last time.  */
   if (execfd == -1 && is_mprotect_enabled ())
@@ -932,6 +933,7 @@ dlmmap (void *start, size_t length, int prot,
 	 with ((prot & ~PROT_WRITE) | PROT_EXEC) and mremap with
 	 MREMAP_DUP and prot at this point.  */
     }
+#endif
 
   pthread_mutex_lock (&open_temp_exec_file_mutex);
   ptr = dlmmap_locked (start, length, prot, flags, offset);