diff --git a/trymos/image_build/files/etc/cloud/cloud.cfg b/trymos/image_build/files/etc/cloud/cloud.cfg
index 94b618d..19f04cd 100644
--- a/trymos/image_build/files/etc/cloud/cloud.cfg
+++ b/trymos/image_build/files/etc/cloud/cloud.cfg
@@ -38,7 +38,6 @@
  - grub-dpkg
  - apt-pipelining
  - apt-configure
- - package-update-upgrade-install
  - landscape
  - timezone
  - puppet
diff --git a/trymos/image_build/files/usr/share/trymos/launch.sh b/trymos/image_build/files/usr/share/trymos/launch.sh
index eeefa88..08c5e38 100755
--- a/trymos/image_build/files/usr/share/trymos/launch.sh
+++ b/trymos/image_build/files/usr/share/trymos/launch.sh
@@ -106,7 +106,10 @@
     local cloud_netplan_cfg="/etc/netplan/50-cloud-init.yaml"
     local match_ip_line
 
-    DEBIAN_FRONTEND=noninteractive apt -y install bridge-utils
+    function install_bridgeutils_retry {
+        DEBIAN_FRONTEND=noninteractive apt -y install bridge-utils
+    }
+    retry 20 "Failed to install bridge-utils" install_bridgeutils_retry
 
 cat << EOF > /etc/systemd/network/10-veth-phy-br.netdev
 [NetDev]
@@ -405,16 +408,39 @@
     cat ${_TRYMOS_INFO_FILE}
 }
 
+function wait_dpkg_finished {
+    local timeout=${1:-600}
+    local delay=${2:-10}
+    dpkg_lock="/var/lib/dpkg/lock-frontend"
+
+    end=$(date +%s)
+    end=$((end + timeout))
+
+    while true; do
+        if lsof ${dpkg_lock} 2>&1 > /dev/null ; then
+            sleep $delay
+            now=$(date +%s)
+            if [ $now -gt $end ] ; then
+                echo "dpkg process still running"
+                exit 1
+            fi
+        else
+            break
+        fi
+    done
+}
+
 case "$NODE_TYPE" in
     # Please keep the "prepare_metadata_files", "disable-rp-filter", "network_config" and "prepare_network" functions
     # at the very beginning in the same order.
     trymos)
+        install_required_packages
+        wait_dpkg_finished
         disable_rp_filter
         configure_virt_public_iface
         network_config
         prepare_network
         prepare_docker_config
-        install_required_packages
         configure_ntp
         configure_atop
         workaround_default_forward_policy