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-rw-r--r--doc/manual/command-ref/conf-file.xml3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/manual/command-ref/conf-file.xml b/doc/manual/command-ref/conf-file.xml
index 053f4d43cb0c..4bd73b2fc828 100644
--- a/doc/manual/command-ref/conf-file.xml
+++ b/doc/manual/command-ref/conf-file.xml
@@ -243,7 +243,8 @@ flag, e.g. <literal>--option gc-keep-outputs false</literal>.</para>
     users” feature</link> to perform the actual builds under different
     users than root).  Currently, chroot builds only work on Linux
     because Nix uses “bind mounts” to make the Nix store and other
-    directories available inside the chroot.</para>
+    directories available inside the chroot. Kernel version 3.13 or later
+    is needed due to a PID namespace fix nix depends on.</para>
 
     </listitem>