src/Pure/Tools/dump.scala

       selection: Sessions.Selection = Sessions.Selection.empty,
       pure_base: Boolean = false,
       skip_base: Boolean = false
     ): Context = {
       val session_options: Options = {
-        val options0 = if (NUMA.enabled) NUMA.policy_options(options) else options
+        val options0 = if (NUMA.available) NUMA.policy_options(options) else options
         val options1 =
           options0 +
             "parallel_proofs=0" +
             "completion_limit=0" +
             "editor_tracing_messages=0"