diff --git a/doc/multiple-output.xml b/doc/multiple-output.xml
index a2acc91e55a2..2f23da8df01e 100644
--- a/doc/multiple-output.xml
+++ b/doc/multiple-output.xml
@@ -68,7 +68,7 @@
 
       <varlistentry><term><varname>
         $outputDevdoc</varname></term><listitem><para>
-        is for <emphasis>developer</emphasis> documentation.  Currently we count gtk-doc in there.  It goes to <varname>devdoc</varname> or is removed (!) by default.  This is because e.g. gtk-doc tends to be rather large and completely unused by nixpkgs users.
+        is for <emphasis>developer</emphasis> documentation.  Currently we count gtk-doc and devhelp books in there.  It goes to <varname>devdoc</varname> or is removed (!) by default.  This is because e.g. gtk-doc tends to be rather large and completely unused by nixpkgs users.
       </para></listitem></varlistentry>
 
       <varlistentry><term><varname>
diff --git a/pkgs/build-support/setup-hooks/multiple-outputs.sh b/pkgs/build-support/setup-hooks/multiple-outputs.sh
index 60d4ccf99ed1..5e788f319780 100644
--- a/pkgs/build-support/setup-hooks/multiple-outputs.sh
+++ b/pkgs/build-support/setup-hooks/multiple-outputs.sh
@@ -140,6 +140,7 @@ _multioutDocs() {
     moveToOutput share/info "${!outputInfo}"
     moveToOutput share/doc "${!outputDoc}"
     moveToOutput share/gtk-doc "${!outputDevdoc}"
+    moveToOutput share/devhelp/books "${!outputDevdoc}"
 
     # the default outputMan is in $bin
     moveToOutput share/man "${!outputMan}"