diff --git a/debian/changelog b/debian/changelog
index e87c41a0..482044a8 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,6 +1,7 @@
 livecd-rootfs (2.441) UNRELEASED; urgency=medium
 
   * Add ubuntu-server-live for a subiquity-based server image.
+  * Refactor functions out of ubuntu-cpc and ubuntu-server hooks.
 
  -- Mathieu Trudel-Lapierre <cyphermox@ubuntu.com>  Thu, 23 Mar 2017 16:20:16 -0400
 
diff --git a/live-build/ubuntu-cpc/functions b/live-build/auto/functions
similarity index 93%
rename from live-build/ubuntu-cpc/functions
rename to live-build/auto/functions
index c7ff023b..af555998 100644
--- a/live-build/ubuntu-cpc/functions
+++ b/live-build/auto/functions
@@ -1,7 +1,7 @@
 # vi: ts=4 expandtab syntax=sh
 
-CLOUD_IMG_STR="# CLOUD_IMG: This file was created/modified by the Cloud Image build process"
-IMAGE_SIZE=$((2252*1024**2))  # 2.2G (the current size we ship)
+imagesize=${IMAGE_SIZE:-$((2252*1024**2))}  # 2.2G (the current size we ship)
+fs_label="${FS_LABEL:-rootfs}"
 
 rootfs_dev_mapper=
 loop_device=
@@ -28,13 +28,13 @@ clean_loops() {
 
 create_empty_disk_image() {
     # Prepare an empty disk image
-    dd if=/dev/zero of="$1" bs=1 count=0 seek="${IMAGE_SIZE}"
+    dd if=/dev/zero of="$1" bs=1 count=0 seek="${imagesize}"
 }
 
 make_ext4_partition() {
     device="$1"
-
-    mkfs.ext4 -F -b 4096 -i 8192 -m 0 -L cloudimg-rootfs -E resize=536870912 "$device"
+    label=${fs_label:+-L "${fs_label}"}
+    mkfs.ext4 -F -b 4096 -i 8192 -m 0 ${label} -E resize=536870912 "$device"
 }
 
 mount_image() {
@@ -103,7 +103,7 @@ mount_disk_image() {
     # such as updating grub and installing software
     cat > $mountpoint/usr/sbin/policy-rc.d << EOF
 #!/bin/sh
-# ${CLOUD_IMG_STR}
+# ${IMAGE_STR}
 echo "All runlevel operations denied by policy" >&2
 exit 101
 EOF
@@ -251,9 +251,9 @@ convert_to_qcow2() {
 
 replace_grub_root_with_label() {
     # When update-grub is run, it will detect the disks in the build system.
-    # Instead, we want grub to use the cloudimg-rootfs labelled disk
+    # Instead, we want grub to use the right labelled disk
     CHROOT_ROOT="$1"
 
-    sed -i -e "s,root=[^ ]\+,root=LABEL=cloudimg-rootfs," \
+    sed -i -e "s,root=[^ ]\+,root=LABEL=${fs_label}," \
         "$CHROOT_ROOT/boot/grub/grub.cfg"
 }
diff --git a/live-build/ubuntu-cpc/hooks/032-disk-image.binary b/live-build/ubuntu-cpc/hooks/032-disk-image.binary
index 0ed08b04..54df55a1 100755
--- a/live-build/ubuntu-cpc/hooks/032-disk-image.binary
+++ b/live-build/ubuntu-cpc/hooks/032-disk-image.binary
@@ -1,6 +1,9 @@
 #!/bin/bash -ex
 
-. /build/config/functions
+IMAGE_STR="# CLOUD_IMG: This file was created/modified by the Cloud Image build process"
+FS_LABEL="cloudimg-rootfs"
+
+. auto/functions
 
 BOOTPART_START=
 BOOTPART_END=
diff --git a/live-build/ubuntu-cpc/hooks/032-root-squashfs.binary b/live-build/ubuntu-cpc/hooks/032-root-squashfs.binary
index 63a00894..f129384c 100755
--- a/live-build/ubuntu-cpc/hooks/032-root-squashfs.binary
+++ b/live-build/ubuntu-cpc/hooks/032-root-squashfs.binary
@@ -17,7 +17,7 @@ if [ -n "$SUBARCH" ]; then
 	exit 0
 fi
 
-. /build/config/functions
+. auto/functions
 
 mkdir binary/boot/squashfs.dir
 cp -a chroot/* binary/boot/squashfs.dir
diff --git a/live-build/ubuntu-cpc/hooks/033-disk-image-uefi.binary b/live-build/ubuntu-cpc/hooks/033-disk-image-uefi.binary
index 04a3c7df..e1ea4f9b 100755
--- a/live-build/ubuntu-cpc/hooks/033-disk-image-uefi.binary
+++ b/live-build/ubuntu-cpc/hooks/033-disk-image-uefi.binary
@@ -9,7 +9,10 @@ case $ARCH in
         ;;
 esac
 
-. /build/config/functions
+IMAGE_STR="# CLOUD_IMG: This file was created/modified by the Cloud Image build process"
+FS_LABEL="cloudimg-rootfs"
+
+. auto/functions
 
 apt-get -qqy install dosfstools gdisk
 
diff --git a/live-build/ubuntu-cpc/hooks/034-disk-image-ppc64el.binary b/live-build/ubuntu-cpc/hooks/034-disk-image-ppc64el.binary
index 1f6b35a7..a0281ee2 100755
--- a/live-build/ubuntu-cpc/hooks/034-disk-image-ppc64el.binary
+++ b/live-build/ubuntu-cpc/hooks/034-disk-image-ppc64el.binary
@@ -7,7 +7,10 @@ case $ARCH in
         ;;
 esac
 
-. /build/config/functions
+IMAGE_STR="# CLOUD_IMG: This file was created/modified by the Cloud Image build process"
+FS_LABEL="cloudimg-rootfs"
+
+. auto/functions
 
 create_partitions() {
     disk_image="$1"
diff --git a/live-build/ubuntu-cpc/hooks/040-qcow2-image.binary b/live-build/ubuntu-cpc/hooks/040-qcow2-image.binary
index f9ab7e62..9b1c6c32 100755
--- a/live-build/ubuntu-cpc/hooks/040-qcow2-image.binary
+++ b/live-build/ubuntu-cpc/hooks/040-qcow2-image.binary
@@ -21,7 +21,7 @@ esac
 
 apt-get install -qqy qemu-utils
 
-. /build/config/functions
+. auto/functions
 
 if [ -f binary/boot/disk-uefi.ext4 ]; then
     convert_to_qcow2 binary/boot/disk-uefi.ext4 livecd.ubuntu-cpc.img
diff --git a/live-build/ubuntu-cpc/hooks/040-vmdk-image.binary b/live-build/ubuntu-cpc/hooks/040-vmdk-image.binary
index 9a71f7ff..6c7bbeb0 100755
--- a/live-build/ubuntu-cpc/hooks/040-vmdk-image.binary
+++ b/live-build/ubuntu-cpc/hooks/040-vmdk-image.binary
@@ -18,7 +18,7 @@ case ${IMAGE_TARGETS:-} in
 		;;
 esac
 
-. /build/config/functions
+. auto/functions
 
 if [ -e binary/boot/disk-uefi.ext4 ]; then
     create_vmdk binary/boot/disk-uefi.ext4 livecd.ubuntu-cpc.vmdk
diff --git a/live-build/ubuntu-cpc/hooks/042-vagrant.binary b/live-build/ubuntu-cpc/hooks/042-vagrant.binary
index 3f962bd8..4be0b7f8 100755
--- a/live-build/ubuntu-cpc/hooks/042-vagrant.binary
+++ b/live-build/ubuntu-cpc/hooks/042-vagrant.binary
@@ -44,7 +44,7 @@ case $ARCH in
            exit 0;;
 esac
 
-. /build/config/functions
+. auto/functions
 
 # Virtualbox is needed for making a small VMDK
 apt-get -qqy install genisoimage qemu-utils
diff --git a/live-build/ubuntu-cpc/hooks/999-extras.binary b/live-build/ubuntu-cpc/hooks/999-extras.binary
index ffc7c691..f5790201 100755
--- a/live-build/ubuntu-cpc/hooks/999-extras.binary
+++ b/live-build/ubuntu-cpc/hooks/999-extras.binary
@@ -9,7 +9,7 @@ if [ ! -d ${my_dir}/extra ]; then
 fi
 
 # Export the common functions to the extras
-. /build/config/functions
+. auto/functions
 
 # Cleaner execution
 /bin/run-parts --regex ".*\.binary" "${extra_d}"
diff --git a/live-build/ubuntu-server-live/functions b/live-build/ubuntu-server-live/functions
deleted file mode 120000
index bca29a2f..00000000
--- a/live-build/ubuntu-server-live/functions
+++ /dev/null
@@ -1 +0,0 @@
-../ubuntu-cpc/functions
\ No newline at end of file
diff --git a/live-build/ubuntu-server-live/hooks/030-root-squashfs.binary b/live-build/ubuntu-server-live/hooks/030-root-squashfs.binary
index 48f60193..eb03d7fc 100755
--- a/live-build/ubuntu-server-live/hooks/030-root-squashfs.binary
+++ b/live-build/ubuntu-server-live/hooks/030-root-squashfs.binary
@@ -20,7 +20,7 @@ if [ -n "$SUBARCH" ]; then
 	exit 0
 fi
 
-. /build/config/functions
+. auto/functions
 
 mkdir binary/boot/squashfs.dir
 cp -a chroot/* binary/boot/squashfs.dir
diff --git a/live-build/ubuntu-server-live/hooks/032-installer-squashfs.binary b/live-build/ubuntu-server-live/hooks/032-installer-squashfs.binary
index e50f80ab..f71d9674 100755
--- a/live-build/ubuntu-server-live/hooks/032-installer-squashfs.binary
+++ b/live-build/ubuntu-server-live/hooks/032-installer-squashfs.binary
@@ -21,7 +21,7 @@ if [ -n "$SUBARCH" ]; then
 	exit 0
 fi
 
-. /build/config/functions
+. auto/functions
 
 SQUASH_ROOT=binary/boot/squashfs.dir
 OVERLAY_ROOT=binary/boot/overlay.dir