diff --git a/ci-dockerfiles-deployment/builders.sh b/ci-dockerfiles-deployment/builders.sh
new file mode 100644
index 0000000..a5b112c
--- /dev/null
+++ b/ci-dockerfiles-deployment/builders.sh
@@ -0,0 +1,75 @@
+#!/bin/bash
+
+set -ex
+
+echo ""
+echo "########################################################################"
+echo "    Gerrit Environment"
+env |grep '^GERRIT'
+echo "########################################################################"
+
+rm -f ${WORKSPACE}/log
+cd dockerfiles/
+
+git_previous_commit=$(git rev-parse HEAD~1)
+git_commit=$(git rev-parse HEAD)
+files=$(git diff --name-only ${git_previous_commit} ${git_commit})
+echo Changes in: ${files}
+changed_dirs=$(dirname ${files}|sort -u)
+
+update_images=""
+for dir in ${changed_dirs}; do
+  # Find the closest directory with build.sh.  This is, primarily,
+  # to handle changes to tcwg-base/tcwg-build/tcwg-builslave/* directories.
+  while [ ! -e ${dir}/build.sh -a ! -e ${dir}/.git ]; do
+    dir=$(dirname ${dir})
+  done
+  # Add this and all dependant images in the update.
+  dir_basename=$(basename ${dir})
+  case "${dir_basename}" in
+    "tcwg-"*)
+      # ${dir} is one of generic tcwg-base/* directories.  Add dependent
+      # images to the list.
+      update_images="${update_images} $(dirname $(find . -path "*-${dir_basename}*/build.sh" | sed -e "s#^\./##g"))"
+      ;;
+    ".")
+      continue
+      ;;
+    *)
+      update_images="${update_images} $(dirname $(find ${dir} -name build.sh))"
+      ;;
+  esac
+done
+update_images="$(echo "${update_images}" | tr " " "\n" | sort -u)"
+
+host_arch=$(dpkg-architecture -qDEB_HOST_ARCH)
+
+for image in ${update_images}; do
+  (
+  cd ${image}
+  image_arch=$(basename ${PWD} | cut -f2 -d '-')
+  skip="skip"
+  if [ -f gerrit-branches ]; then
+    # Build only from branches mentioned in gerrit-branches
+    if grep -q "^${GERRIT_BRANCH}\$" gerrit-branches; then
+      skip="no"
+    fi
+  elif [ x"${GERRIT_BRANCH}" = x"master" ]; then
+    # No gerrit-branch file, so build only from "master" branch.
+    skip="no"
+  fi
+  case "${skip}:${host_arch}:${image_arch}" in
+    "skip:"*)
+      echo "Skipping: don't need to build ${image} on branch ${GERRIT_BRANCH}"
+      ;;
+    "no:amd64:amd64"|"no:amd64:i386"|"no:arm64:arm64"|"no:armhf:armhf")
+      echo "=== Start build: ${image} ==="
+      bash -x ./build.sh || echo "=== FAIL: ${image} ===" >> ${WORKSPACE}/log
+      ;;
+    *)
+      echo "Skipping: can't build for ${image_arch} on ${host_arch}"
+      ;;
+  esac
+  )||echo $image failed >> ${WORKSPACE}/log
+done
+