diff --git a/precise/host/hooks/install.d/40-btrfs.sh b/precise/host/hooks/install.d/40-btrfs.sh
index a33e5a2..2af010f 100755
--- a/precise/host/hooks/install.d/40-btrfs.sh
+++ b/precise/host/hooks/install.d/40-btrfs.sh
@@ -49,10 +49,10 @@ if [ "$UPDATE_BTRFS_TOOLS" ]; then
             cd /root/dev/c &&
             git clone git://git.kernel.org/pub/scm/linux/kernel/git/kdave/btrfs-progs.git &&
             cd btrfs-progs &&
-            apt-get install -y asciidoc xmlto --no-install-recommends </dev/null &&
+            apt-get install -y asciidoc xmlto sphinx --no-install-recommends </dev/null &&
             apt-get install -y build-essential autoconf pkg-config uuid-dev libattr1-dev \
                     zlib1g-dev python3-dev python3-setuptools libacl1-dev e2fslibs-dev \
-                    libblkid-dev liblzo2-dev libzstd-dev </dev/null &&
+                    libblkid-dev liblzo2-dev libzstd-dev libudev-dev </dev/null &&
             ./autogen.sh &&
             ./configure --prefix=/opt/apps/btrfs-tools --disable-zoned &&
             make &&
@@ -100,7 +100,7 @@ mount "$BTRFS_MOUNT_ROOT"
 
 if [ -d /var/lib/docker ] ; then
     RESTART_DOCKER=yes
-    service docker stop
+    service docker stop &&
     ## XXXvlab: moving doesn't work and is not desirable, as we want docker
     ## to setup and detect new underlying btrfs system.
     # mv "/var/lib/docker/"* "$BTRFS_MOUNT_ROOT/var/lib/docker"