Index: runtime/test/lit.cfg
===================================================================
--- runtime/test/lit.cfg
+++ runtime/test/lit.cfg
@@ -116,7 +116,7 @@
 
 if config.has_ompt:
     config.substitutions.append(("FileCheck", config.test_filecheck))
-    config.substitutions.append(("%sort-threads", "sort --numeric-sort --stable"))
+    config.substitutions.append(("%sort-threads", "sort -n -s"))
     if config.operating_system == 'Windows':
         # No such environment variable on Windows.
         config.substitutions.append(("%preload-tool", "true ||"))