diff --git a/nixos/doc/manual/configuration/profiles/clone-config.xml b/nixos/doc/manual/configuration/profiles/clone-config.xml
index 234835845e2..21c4ea75d6d 100644
--- a/nixos/doc/manual/configuration/profiles/clone-config.xml
+++ b/nixos/doc/manual/configuration/profiles/clone-config.xml
@@ -11,4 +11,11 @@
   creating the image in the first place. As a result it allows users to edit
   and rebuild the live-system.
  </para>
+
+ <para>
+  On images where the installation media also becomes an installation target,
+  copying over <literal>configuration.nix</literal> should be disabled by
+  setting <literal>installer.cloneConfig</literal> to <literal>false</literal>.
+  This is already done in <literal>sd-image.nix</literal>.
+ </para>
 </section>