diff -Nru ruby-gnome-3.4.3/debian/changelog ruby-gnome-3.4.3/debian/changelog
--- ruby-gnome-3.4.3/debian/changelog	2020-05-27 07:26:29.000000000 +0000
+++ ruby-gnome-3.4.3/debian/changelog	2021-10-02 13:22:16.000000000 +0000
@@ -1,3 +1,11 @@
+ruby-gnome (3.4.3-1+rpi1) bookworm-staging; urgency=medium
+
+  * Add a manual dependency on libffi8 to stop this migrating from
+    bookworm-staging to bookworm until libffi does. This change
+    should be dropped once the new libffi migrates to bookworm.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Sat, 02 Oct 2021 13:22:16 +0000
+
 ruby-gnome (3.4.3-1) unstable; urgency=medium
 
   * New upstream version 3.4.3
diff -Nru ruby-gnome-3.4.3/debian/control ruby-gnome-3.4.3/debian/control
--- ruby-gnome-3.4.3/debian/control	2020-05-27 07:14:02.000000000 +0000
+++ ruby-gnome-3.4.3/debian/control	2021-10-02 13:21:58.000000000 +0000
@@ -255,6 +255,7 @@
 X-DhRuby-Root: gobject-introspection
 Depends: ruby | ruby-interpreter,
          ruby-glib2 (= ${binary:Version}),
+         libffi8,
          ${misc:Depends},
          ${shlibs:Depends}
 Multi-Arch: same