diff --git a/debian/changelog b/debian/changelog
index 22f5fd29..843794e2 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,16 @@
+livecd-rootfs (2.489) bionic; urgency=medium
+
+  [ Balint Reczey ]
+  * Revert to building minimized and not minimimized images with the same
+    ~2.2 GiB size
+  * Stop suggesting partimage which is not used anymore
+  * Drop Nexus 7 support
+
+  [ Steve Langasek ]
+  * Add support for passing snap channel to ubuntu-core image builds.
+
+ -- Steve Langasek <steve.langasek@ubuntu.com>  Fri, 12 Jan 2018 15:04:42 -0800
+
 livecd-rootfs (2.488) bionic; urgency=medium
 
   * Enable systemd-networkd by default for live-server installs.
diff --git a/debian/control b/debian/control
index 65dd4cf7..c66d3901 100644
--- a/debian/control
+++ b/debian/control
@@ -35,7 +35,6 @@ Depends: ${misc:Depends},
          vmdk-stream-converter [amd64 i386],
          xz-utils,
          zerofree
-Suggests: partimage
 Breaks: ubuntu-defaults-builder (<< 0.32)
 Description: construction script for the livecd rootfs
  livecd-rootfs provides the script used to create the root filesystem
diff --git a/live-build/auto/build b/live-build/auto/build
index 89e67875..6d4fbfba 100755
--- a/live-build/auto/build
+++ b/live-build/auto/build
@@ -21,8 +21,9 @@ PREFIX="livecd.$PROJECT${SUBARCH:+-$SUBARCH}"
 if [ "${IMAGEFORMAT:-}" = "ubuntu-image" ]; then
 	# Use ubuntu-image instead of live-build
 
+	CHANNEL="${CHANNEL:-edge}"
 	env SNAPPY_STORE_NO_CDN=1 \
-	ubuntu-image -c edge $UBUNTU_IMAGE_ARGS \
+	ubuntu-image -c "$CHANNEL" $UBUNTU_IMAGE_ARGS \
 		-o "$PREFIX".img "$PREFIX".model-assertion
 	xz -0 -T4 "$PREFIX".img
 	mv seed.manifest "$PREFIX".manifest
@@ -835,7 +836,7 @@ if [ "$NUMFLAVOURS" = 1 ] && [ "$LB_LINUX_FLAVOURS" != "none" ]; then
 	fi
 fi
 
-if [ "$SUBARCH" = "ac100" ] || [ "$SUBARCH" = "nexus7" ]; then
+if [ "$SUBARCH" = "ac100" ]; then
 	# create the md5sum and size files for which we are actually doing all this
 	md5sum $PREFIX.rootfs.tar.gz >chroot/installer.md5
 	wc -c $PREFIX.rootfs.tar.gz >chroot/installer.size
@@ -856,16 +857,6 @@ if [ "$SUBARCH" = "ac100" ] || [ "$SUBARCH" = "nexus7" ]; then
 	# create boot.img
 	Chroot chroot "abootimg --create /boot/installer-${KVERS}.img -f /boot/bootimg.cfg-$SUBARCH -r /boot/initrd.img-${KVERS} -k /boot/vmlinuz-${KVERS}"
 
-	if [ "$SUBARCH" = "nexus7" ]; then
-		# roll the android rootfs images
-		mkdir -p userdata
-		mv $PREFIX.rootfs.tar.gz userdata/rootfs.tar.gz
-		apt-get -y install android-tools-fsutils
-		make_ext4fs -l 6G -s $PREFIX.ext4-$FLAVOUR userdata/
-		mv userdata/rootfs.tar.gz $PREFIX.rootfs.tar.gz
-		ln -sf "$PREFIX.ext4-$FLAVOUR" "$PREFIX.ext4"
-	fi
-
 	# clean up
 	lb chroot_devpts remove "$@"
 	lb chroot_sysfs remove "$@"
diff --git a/live-build/auto/config b/live-build/auto/config
index 4f3304b2..9abaaa65 100755
--- a/live-build/auto/config
+++ b/live-build/auto/config
@@ -642,16 +642,6 @@ case $ARCH in
 				add_package live ac100-tarball-installer
 				BINARY_REMOVE_LINUX=false
 				;;
-			nexus7)
-				COMPONENTS='main restricted universe multiverse'
-				add_package install zram-config abootimg 
-				add_package install nvidia-tegra3 ubuntu-defaults-nexus7
-				add_package live ac100-tarball-installer
-				BINARY_REMOVE_LINUX=false
-				mkdir -p config/preseed
-				echo "linux-firmware-nexus7 shared/nexus7_notice_accepted boolean true" >config/preseed/linux-firmware-nexus7.preseed.chroot
-				echo "d-i passwd/auto-login boolean true" >config/preseed/autologin.preseed.chroot
-				;;
 			raspi2)
 				COMPONENTS='main restricted universe multiverse'
 				add_package install linux-firmware-raspi2 u-boot-rpi flash-kernel u-boot-tools
@@ -717,11 +707,6 @@ echo "SUBPROJECT=\"${SUBPROJECT:-}\"" >> config/chroot
 echo "LB_BINARY_HOOKS=\"$BINARY_HOOKS\"" >> config/binary
 echo "BUILDSTAMP=\"$NOW\"" >> config/binary
 echo "SUBPROJECT=\"${SUBPROJECT:-}\"" >> config/binary
-if [ "${SUBPROJECT:-}" = minimized ]; then
-	# try building minimized images in a 1GiB image but still allow overriding
-	# IMAGE_SIZE in lb build
-	echo 'IMAGE_SIZE=${IMAGE_SIZE:-'$((1024*1024*1024))'}' >> config/binary
-fi
 
 case $ARCH+$SUBARCH in
 	armhf+raspi2)