diff --git a/.zuul.yaml b/.zuul.yaml
index 6bd4122c57..e4e035b142 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -57,6 +57,8 @@
     files:
       - sysinv/sysinv/*
     vars:
+      tox_environment:
+        STX_PREFIX: ''
       tox_envlist: py27
       tox_extra_args: -c sysinv/sysinv/sysinv/tox.ini
 
@@ -73,6 +75,8 @@
     files:
       - sysinv/sysinv/*
     vars:
+      tox_environment:
+        STX_PREFIX: ''
       tox_envlist: py35
       tox_extra_args: -c sysinv/sysinv/sysinv/tox.ini
 
@@ -84,6 +88,8 @@
     files:
       - sysinv/sysinv/*
     vars:
+      tox_environment:
+        STX_PREFIX: ''
       tox_envlist: flake8
       tox_extra_args: -c sysinv/sysinv/sysinv/tox.ini
 
@@ -99,6 +105,8 @@
     files:
       - sysinv/sysinv/*
     vars:
+      tox_environment:
+        STX_PREFIX: ''
       tox_envlist: pylint
       tox_extra_args: -c sysinv/sysinv/sysinv/tox.ini
 
@@ -109,6 +117,8 @@
     files:
       - controllerconfig/*
     vars:
+      tox_environment:
+        STX_PREFIX: ''
       tox_envlist: flake8
       tox_extra_args: -c controllerconfig/controllerconfig/tox.ini
 
@@ -122,6 +132,8 @@
     files:
       - controllerconfig/*
     vars:
+      tox_environment:
+        STX_PREFIX: ''
       tox_envlist: py27
       tox_extra_args: -c controllerconfig/controllerconfig/tox.ini
 
@@ -135,6 +147,8 @@
     files:
       - controllerconfig/*
     vars:
+      tox_environment:
+        STX_PREFIX: ''
       tox_envlist: pylint
       tox_extra_args: -c controllerconfig/controllerconfig/tox.ini
 
@@ -174,6 +188,8 @@
       - starlingx/fault
       - starlingx/integ
     vars:
+      tox_environment:
+        STX_PREFIX: ''
       tox_envlist: py27
       tox_extra_args: -c sysinv/cgts-client/cgts-client/tox.ini
 
@@ -185,6 +201,8 @@
     files:
       - sysinv/cgts-client/*
     vars:
+      tox_environment:
+        STX_PREFIX: ''
       tox_envlist: pep8
       tox_extra_args: -c sysinv/cgts-client/cgts-client/tox.ini
 
@@ -200,6 +218,8 @@
       - starlingx/fault
       - starlingx/integ
     vars:
+      tox_environment:
+        STX_PREFIX: ''
       tox_envlist: pylint
       tox_extra_args: -c sysinv/cgts-client/cgts-client/tox.ini
 
diff --git a/controllerconfig/controllerconfig/tox.ini b/controllerconfig/controllerconfig/tox.ini
index fd083c3c21..430282b750 100644
--- a/controllerconfig/controllerconfig/tox.ini
+++ b/controllerconfig/controllerconfig/tox.ini
@@ -11,13 +11,18 @@ stxdir = {toxinidir}/../../..
 
 [testenv]
 whitelist_externals = find
-install_command = pip install  --no-cache-dir  -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt?h=stable/pike} {opts} {packages}
+install_command = pip install  --no-cache-dir  -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/stable/pike/upper-constraints.txt} {opts} {packages}
+
+# Note: Developers can leave STX_PREFIX unset in their env, and it will default to "stx-".
+# Zuul sets STX_PREFIX to an empty string.
+setenv = STX_PREFIX = {env:STX_PREFIX:stx-}
+
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-       -e{[tox]stxdir}/fault/fm-api
-       -e{[tox]stxdir}/update/tsconfig/tsconfig
-       -e{[tox]stxdir}/config/sysinv/sysinv/sysinv
-       -e{[tox]stxdir}/config/sysinv/cgts-client/cgts-client
+       -e{[tox]stxdir}/{env:STX_PREFIX}fault/fm-api
+       -e{[tox]stxdir}/{env:STX_PREFIX}update/tsconfig/tsconfig
+       -e{[tox]stxdir}/{env:STX_PREFIX}config/sysinv/sysinv/sysinv
+       -e{[tox]stxdir}/{env:STX_PREFIX}config/sysinv/cgts-client/cgts-client
 
 [testenv:venv]
 commands = {posargs}
diff --git a/puppet-manifests/tox.ini b/puppet-manifests/tox.ini
index 19e4a409e2..a9a8e59da3 100644
--- a/puppet-manifests/tox.ini
+++ b/puppet-manifests/tox.ini
@@ -17,6 +17,8 @@ skipsdist = True
 recreate = True
 
 [testenv:puppetlint]
+# Note: centos developer env requires ruby-devel
+# Ubuntu developer env requires ruby-dev
 deps =
 whitelist_externals =
     gem
diff --git a/puppet-modules-wrs/tox.ini b/puppet-modules-wrs/tox.ini
index 8e0bfa7488..ff1641a039 100644
--- a/puppet-modules-wrs/tox.ini
+++ b/puppet-modules-wrs/tox.ini
@@ -17,6 +17,8 @@ skipsdist = True
 recreate = True
 
 [testenv:puppetlint]
+# Note: centos developer env requires ruby-devel
+# Ubuntu developer env requires ruby-dev
 deps =
 whitelist_externals =
     gem
diff --git a/sysinv/cgts-client/cgts-client/tox.ini b/sysinv/cgts-client/cgts-client/tox.ini
index 4c0c3a26b2..ac38a89c21 100644
--- a/sysinv/cgts-client/cgts-client/tox.ini
+++ b/sysinv/cgts-client/cgts-client/tox.ini
@@ -5,22 +5,23 @@ minversion = 1.6
 
 # tox does not work if the path to the workdir is too long, so move it to /tmp
 toxworkdir = /tmp/{env:USER}_cgtsclienttox
-cgcsdir = {toxinidir}/../../../..
+stxdir = {toxinidir}/../../../..
 distshare={toxworkdir}/.tox/distshare
 
-wrdeps = -e{[tox]cgcsdir}/update/tsconfig/tsconfig
-
 [testenv]
+# Note: Developers can leave STX_PREFIX unset in their env, and it will default to "stx-".
+# Zuul sets STX_PREFIX to an empty string.
 setenv = VIRTUAL_ENV={envdir}
          PYTHONWARNINGS=default::DeprecationWarning
          OS_TEST_PATH=cgtsclient/tests
          TESTR_START_DIR=cgtsclient/tests
+         STX_PREFIX = {env:STX_PREFIX:stx-}
 basepython = python2.7
 usedevelop = True
 install_command = pip install  -U  -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt?h=stable/pike} {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-       {[tox]wrdeps}
+       -e{[tox]stxdir}/{env:STX_PREFIX}update/tsconfig/tsconfig
 
 commands =
   find {toxinidir} -not -path '{toxinidir}/.tox/*' -name '*.py[c|o]' -delete
diff --git a/sysinv/sysinv/sysinv/tox.ini b/sysinv/sysinv/sysinv/tox.ini
index e443f662af..408f36189e 100644
--- a/sysinv/sysinv/sysinv/tox.ini
+++ b/sysinv/sysinv/sysinv/tox.ini
@@ -20,9 +20,13 @@ sitepackages = True
 # tox is silly... these need to be separated by a newline....
 whitelist_externals = bash
                       find
-install_command = pip install -v -v -v -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt?h=stable/pike}  {opts} {packages}
+
+install_command = pip install -v -v -v -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/stable/pike/upper-constraints.txt}  {opts} {packages}
+
 # Note the hash seed is set to 0 until can be tested with a
 # random hash seed successfully.
+# Note: Developers can leave STX_PREFIX unset in their env, and it will default to "stx-".
+# Zuul sets STX_PREFIX to an empty string.
 setenv = VIRTUAL_ENV={envdir}
          PYTHONHASHSEED=0
          PYTHONDONTWRITEBYTECODE=1
@@ -34,15 +38,16 @@ setenv = VIRTUAL_ENV={envdir}
          SYSINV_TEST_ENV=True
          TOX_WORK_DIR={toxworkdir}
          PYLINTHOME={toxworkdir}
+         STX_PREFIX = {env:STX_PREFIX:stx-}
 
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-       -e{[tox]stxdir}/update/tsconfig/tsconfig
-       -e{[tox]stxdir}/fault/fm-api
-       -e{[tox]stxdir}/fault/python-fmclient/fmclient
-       -e{[tox]stxdir}/config/controllerconfig/controllerconfig
-       -e{[tox]stxdir}/update/cgcs-patch/cgcs-patch
-       -e{[tox]stxdir}/integ/utilities/platform-util/platform-util
+       -e{[tox]stxdir}/{env:STX_PREFIX}update/tsconfig/tsconfig
+       -e{[tox]stxdir}/{env:STX_PREFIX}fault/fm-api
+       -e{[tox]stxdir}/{env:STX_PREFIX}fault/python-fmclient/fmclient
+       -e{[tox]stxdir}/{env:STX_PREFIX}config/controllerconfig/controllerconfig
+       -e{[tox]stxdir}/{env:STX_PREFIX}update/cgcs-patch/cgcs-patch
+       -e{[tox]stxdir}/{env:STX_PREFIX}integ/utilities/platform-util/platform-util
 
 commands =
   find . -type f -name "*.pyc" -delete