--- a/doc/book/admin/setup.rst	Tue Mar 17 13:36:27 2020 +0100
+++ b/doc/book/admin/setup.rst	Wed Mar 18 09:22:45 2020 +0100
@@ -91,6 +91,12 @@
   * `python3-cubicweb-postgresql-support` contains the necessary dependencies for
     using :ref:`cubicweb with postgresql datatabase <PostgresqlConfiguration>`
 
+.. note::
+
+  You may also require extra Debian packages such as::
+
+      gettext, graphviz
+
 .. _`list of sources`: http://wiki.debian.org/SourcesList
 .. _`Logilab's gnupg key`: https://www.logilab.fr/logilab-debian-keyring.gpg
 .. _`CubicWeb.org Forge`: http://www.cubicweb.org/project/