Index: src/sort.c
===================================================================
--- src/sort.c.orig
+++ src/sort.c
@@ -5263,8 +5263,8 @@ main (int argc, char **argv)
     {
       if (!nthreads)
         {
-          unsigned long int np = num_processors (NPROC_CURRENT_OVERRIDABLE);
-          nthreads = MIN (np, DEFAULT_MAX_THREADS);
+          //unsigned long int np = num_processors (NPROC_CURRENT_OVERRIDABLE);
+          nthreads = 1; //MIN (np, DEFAULT_MAX_THREADS);
         }
 
       /* Avoid integer overflow later.  */