diff --git a/devstack/lib/stx-update b/devstack/lib/stx-update
index c20565f2..7a17098a 100644
--- a/devstack/lib/stx-update
+++ b/devstack/lib/stx-update
@@ -1,12 +1,6 @@
 #!/bin/bash
 #
 # lib/stx-update
-# Functions to control the configuration and operation of stx-update
-
-# Dependencies:
-#
-# - ``functions`` file
-# - ``DEST``, ``DATA_DIR``, ``STACK_USER`` must be defined
 
 # ``stack.sh`` calls the entry points in this order:
 #
@@ -25,20 +19,27 @@ set -o xtrace
 # --------
 
 STXUPDATE_REPO=${STXUPDATE_REPO:-${GIT_BASE}/openstack/stx-update.git}
-STXUPDATE_DIR=$DEST/stx-update
+STXUPDATE_DIR=${GITDIR[$STX_UPDATE_NAME]}
 
 STX_PATCH_DIR=$STXUPDATE_DIR/cgcs-patch/
 TSCONFIG_DIR=$STXUPDATE_DIR/tsconfig/
 
-STX_BIN_DIR=$(get_python_exec_prefix)
+# STX_INST_DIR should be a non-root-writable place to install build artifacts
+STX_INST_DIR=${STX_INST_DIR:-$DEST/usr}
+STX_BIN_DIR=$STX_INST_DIR/bin
 PYTHON_SITE_DIR=$(python -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")
 
 function install_sw_patch {
     pushd $STX_PATCH_DIR/cgcs-patch
-    sudo python setup.py install --root=/ --install-lib=$PYTHON_SITE_DIR --prefix=/usr --install-data=/usr/share --single-version-externally-managed
+    sudo python setup.py install \
+        --root=/ \
+        --install-lib=$PYTHON_SITE_DIR \
+        --prefix=/usr \
+        --install-data=/usr/share \
+        --single-version-externally-managed
     popd
 
-    local stx_patch_sbindir=/usr/local/sbin/
+    local stx_patch_sbindir=$STX_INST_DIR/sbin
     local stx_patch_sysconfdir=/etc/
     sudo install -m 755 -d ${stx_patch_sbindir}
     sudo install -m 755 -d ${stx_patch_sysconfdir}/bash_completion.d
@@ -55,7 +56,12 @@ function install_tsconfig {
     # no setup.cfg in tsconfig, so we can not use pip install -e
     # setup_dev_lib "tsconfig"
     pushd $TSCONFIG_DIR/tsconfig
-    sudo python setup.py install --root=/ --install-lib=$PYTHON_SITE_DIR --prefix=/usr --install-data=/usr/share --single-version-externally-managed
+    sudo python setup.py install \
+        --root=/ \
+        --install-lib=$PYTHON_SITE_DIR \
+        --prefix=/usr \
+        --install-data=/usr/share \
+        --single-version-externally-managed
     popd
     sudo install -d -m 755 $STX_BIN_DIR
     sudo install -p -D -m 700 $TSCONFIG_DIR/scripts/tsconfig $STX_BIN_DIR/tsconfig
@@ -69,4 +75,5 @@ function install_update {
         install_tsconfig
     fi
 }
+
 $_XTRACE_STX_UPDATE
diff --git a/devstack/plugin.sh b/devstack/plugin.sh
index 14dba444..cce913c7 100755
--- a/devstack/plugin.sh
+++ b/devstack/plugin.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # devstack/plugin.sh
-# Triggers stx_update specific functions to install and configure stx_update
+# Triggers specific functions to install and configure stx-update
 
 echo_summary "stx-update devstack plugin.sh called: $1/$2"
 
@@ -14,6 +14,7 @@ if is_service_enabled stx-update; then
     elif [[ "$1" == "stack" && "$2" == "post-config" ]]; then
         # Configure after the other layer 1 and 2 services have been configured
         echo_summary "Configure stx-update"
+        # configure_update
     elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
         # Initialize and start the service
         echo_summary "Initialize and start stx-update"
diff --git a/devstack/settings b/devstack/settings
index 02198e36..4142b9fc 100644
--- a/devstack/settings
+++ b/devstack/settings
@@ -1,6 +1,14 @@
 #!/bin/bash
 # Devstack settings
 
+# This plugin enables StarlingX stx-update services and follows the
+# DevStack plugin contract:
+# https://docs.openstack.org/devstack/latest/plugins.html#plugin-sh-contract
+
+# Services
+# sw-patch
+# tsconfig
+
 # Defaults
 # --------
 
@@ -8,7 +16,11 @@ STX_UPDATE_NAME=stx-update
 
 ######### Plugin Specific ##########
 enable_service $STX_UPDATE_NAME
-#define_plugin $STX_UPDATE_NAME
+
+# This must not use any variables to work properly in OpenStack's DevStack playbook
+define_plugin stx-update
+# This works for Zuul jobs using OpenStack's DevStack roles
+#plugin_requires stx-update stx-xxxx
 
 # Initial source of lib script
 source $DEST/stx-update/devstack/lib/stx-update
diff --git a/tox.ini b/tox.ini
index f1ad4c30..3cf5e33d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -37,17 +37,21 @@ deps = -r{toxinidir}/requirements.txt
 basepython = python3
 whitelist_externals = bash
 commands =
-  bash -c "find {toxinidir}        \
-            \( -name .tox -prune \)         \
-            -o -type f -name '*.yaml'       \
-            -print0 | xargs --no-run-if-empty -0 yamllint"
   bash -c "find {toxinidir}          \
          -not \( -type d -name .?\* -prune \) \
          -type f                              \
          -not -name \*~                       \
          -not -name \*.md                     \
-         -name \*.sh                          \
-         -print0 | xargs --no-run-if-empty -0 bashate -v -e 'E*' -iE006"
+         \(                                   \
+          -name \*.sh                         \
+          -or -not -wholename \*/devstack/files/\* \
+          -wholename \*/devstack/\*           \
+         \)                                   \
+         -print0 | xargs -0 bashate -v -e 'E*' -iE006"
+  bash -c "find {toxinidir}        \
+            \( -name .tox -prune \)         \
+            -o -type f -name '*.yaml'       \
+            -print0 | xargs -0 yamllint"
 
 [flake8]
 # ignore below errors , will fix flake8 errors in future