diff --git a/debian/changelog b/debian/changelog
index f7c782d4..b8891371 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,12 @@
+livecd-rootfs (2.212) utopic; urgency=medium
+
+  * live-build/auto/config: If EXTRA_ARCHIVES is set in the environment,
+    dump its value into config/archives/extra-archives.list.chroot and
+    config/archives/extra-archives.list.binary.  This makes it easier for a
+    builder to build an image against an additional PPA.
+
+ -- Colin Watson <cjwatson@ubuntu.com>  Mon, 19 May 2014 12:14:28 +0100
+
 livecd-rootfs (2.211) utopic; urgency=medium
 
   * Add an ubuntu-desktop-next project for building a desktop flavour
diff --git a/live-build/auto/config b/live-build/auto/config
index 7e262380..0334ec4f 100755
--- a/live-build/auto/config
+++ b/live-build/auto/config
@@ -197,7 +197,7 @@ case $PROJECT in
 		add_package install ubuntu-desktop-next
 		COMPONENTS='main restricted universe'
 		LIVE_TASK='ubuntu-live'
-	;;
+		;;
 
 	kubuntu|kubuntu-dvd)
 		add_task install minimal standard
@@ -498,6 +498,13 @@ EOF
 		;;
 esac
 
+if [ "$EXTRA_ARCHIVES" ]; then
+	printf '%s\n' "$EXTRA_ARCHIVES" \
+		> config/archives/extra-archives.list.chroot
+	cp -a config/archives/extra-archives.list.chroot \
+	      config/archives/extra-archives.list.binary
+fi
+
 # cribbed from cdimage, perhaps this should be a small helper script in germinate?
 add_inheritance () {
 	case " $inherit " in