diff --git a/debian/changelog b/debian/changelog
index 01e89bdf..e240d416 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,12 @@
+livecd-rootfs (2.840) UNRELEASED; urgency=medium
+
+  * auto/config: switch ubuntucinnamon and ubuntu-unity builds to use add_task
+    to get their desktop packages. Previously most (all?) flavour builds got
+    the snaps from that flavour's "desktop" seed implicitly added, but now an
+    explicit add_task is needed.
+
+ -- Michael Hudson-Doyle <michael.hudson@ubuntu.com>  Thu, 18 May 2023 09:25:38 +1200
+
 livecd-rootfs (2.839) mantic; urgency=medium
 
   * Drop use of --removable flag to grub-install from
diff --git a/live-build/auto/config b/live-build/auto/config
index db75472c..4d6c080f 100755
--- a/live-build/auto/config
+++ b/live-build/auto/config
@@ -847,8 +847,7 @@ case $PROJECT in
 		;;
 
 	ubuntucinnamon)
-		add_task install minimal standard
-		add_package install ubuntucinnamon-desktop
+		add_task install minimal standard ubuntucinnamon-desktop
 		# XXX: Adding live packages manually temporarily until we have
 		#  the live task for ubuntucinnamon set up properly.
 		add_package live ubiquity-frontend-gtk
@@ -910,8 +909,7 @@ case $PROJECT in
 		;;
 
 	ubuntu-unity)
-		add_task install minimal standard
-		add_package install ubuntu-unity-desktop
+		add_task install minimal standard ubuntu-unity-desktop
 		# XXX: Adding live packages manually temporarily until we have
 		#  the live task for ubuntu-unity set up properly.
 		add_package live metacity ubiquity-frontend-gtk