[jhbuild] doc: apt-file is required for users on Debian/Ubuntu (GNOME bug 682104)

[Craig Keogh <cskeogh src gnome org>]

commit 309ed16edcaa7c79c5ae506d46f2ad181a7bc13f
Author: Craig Keogh <cskeogh adam com au>
Date:   Wed Aug 29 09:57:06 2012 +0930

    doc: apt-file is required for users on Debian/Ubuntu (GNOME bug 682104)

 doc/C/index.docbook |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/doc/C/index.docbook b/doc/C/index.docbook
index 6623219..20c0b45 100644
--- a/doc/C/index.docbook
+++ b/doc/C/index.docbook
@@ -1366,8 +1366,14 @@ libgnomecanvas is missing branch definition for gnome-2-20
           </term>
           <listitem>
             <simpara>This option installs system packages which are
-              dependencies of the moduleset. The system packages are installed
-              using <application>PackageKit</application>.</simpara>
+              dependencies of the moduleset. The installation method depends on
+              your distribution. System packages are installed using
+              <application>PackageKit</application>, if available. For
+              distributions using <application>APT</application> such as
+              <systemitem class="osname">Debian</systemitem> and
+              <systemitem class="osname">Ubuntu</systemitem>, this option
+              requires <application>apt-file</application> to be installed.
+            </simpara>
           </listitem>
         </varlistentry>
       </variablelist>