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-rw-r--r--doc/manual/command-ref/opt-common.xml5
1 files changed, 3 insertions, 2 deletions
diff --git a/doc/manual/command-ref/opt-common.xml b/doc/manual/command-ref/opt-common.xml
index 2a076877a1b4..2aa41c4d4389 100644
--- a/doc/manual/command-ref/opt-common.xml
+++ b/doc/manual/command-ref/opt-common.xml
@@ -93,8 +93,9 @@
   <term><option>-j</option></term>
 
   <listitem><para>Sets the maximum number of build jobs that Nix will
-  perform in parallel to the specified number.  The default is
-  specified by the <link
+  perform in parallel to the specified number.  Specify
+  <literal>auto</literal> to use the number of CPUs in the system.
+  The default is specified by the <link
   linkend='conf-build-max-jobs'><literal>build-max-jobs</literal></link>
   configuration setting, which itself defaults to
   <literal>1</literal>.  A higher value is useful on SMP systems or to