diff --git a/build-tools/stx/debrepack.py b/build-tools/stx/debrepack.py
index a6b8d6db..6b686460 100755
--- a/build-tools/stx/debrepack.py
+++ b/build-tools/stx/debrepack.py
@@ -32,8 +32,22 @@ import yaml
 
 RELEASENOTES = " ".join([os.environ.get('PROJECT'), os.environ.get('MY_RELEASE'), "distribution"])
 DIST = os.environ.get('STX_DIST')
+
+# The CENGN_STRATEGY and CENGNURL references is retained for backward
+# compatability with pre-existing build environments.
 CENGN_BASE = os.path.join(os.environ.get('CENGNURL'), "debian")
 CENGN_STRATEGY = os.environ.get('CENGN_STRATEGY')
+STX_MIRROR_BASE = os.path.join(os.environ.get('STX_MIRROR_URL'), "debian")
+STX_MIRROR_STRATEGY = os.environ.get('STX_MIRROR_STRATEGY')
+if STX_MIRROR_BASE is None:
+    STX_MIRROR_BASE = CENGN_BASE
+if STX_MIRROR_STRATEGY is None:
+    STX_MIRROR_STRATEGY = CENGN_STRATEGY
+    if STX_MIRROR_STRATEGY == "cengn":
+        STX_MIRROR_STRATEGY = "stx_mirror"
+    if STX_MIRROR_STRATEGY == "cengn_first":
+        STX_MIRROR_STRATEGY = "stx_mirror_first"
+
 BTYPE = "@KERNEL_TYPE@"
 
 
@@ -167,10 +181,10 @@ class Parser():
         if not self.logger.handlers:
             utils.set_logger(self.logger, log_level=log_level)
 
-        self.strategy = "cengn_first"
-        if CENGN_STRATEGY is not None:
-            self.strategy = CENGN_STRATEGY
-            # dry run to check the value of CENGN_STRATEGY
+        self.strategy = "stx_mirror_first"
+        if STX_MIRROR_STRATEGY is not None:
+            self.strategy = STX_MIRROR_STRATEGY
+            # dry run to check the value of STX_MIRROR_STRATEGY
             get_download_url("https://testurl/tarball.tgz", self.strategy)[0]
 
         if not os.path.isdir(basedir):
diff --git a/build-tools/stx/downloader b/build-tools/stx/downloader
index c1df6f25..14d97f77 100755
--- a/build-tools/stx/downloader
+++ b/build-tools/stx/downloader
@@ -45,7 +45,16 @@ ALL_DISTROS = discovery.get_all_distros()
 ALL_LAYERS = discovery.get_all_layers(distro=STX_DEFAULT_DISTRO)
 ALL_BUILD_TYPES = discovery.get_all_build_types(distro=STX_DEFAULT_DISTRO)
 
+# The CENGN_STRATEGY reference is retained for backward compatability 
+# with pre-existing build environments.
 CENGN_STRATEGY = os.environ.get('CENGN_STRATEGY')
+STX_MIRROR_STRATEGY = os.environ.get('STX_MIRROR_STRATEGY')
+if not STX_MIRROR_STRATEGY:
+    STX_MIRROR_STRATEGY = CENGN_STRATEGY
+if STX_MIRROR_STRATEGY == "cengn":
+    STX_MIRROR_STRATEGY = "stx_mirror"
+elif STX_MIRROR_STRATEGY == "cengn_first":
+    STX_MIRROR_STRATEGY = "stx_mirror_first"
 
 def get_downloaded(dl_dir, dl_type):
     """
@@ -267,7 +276,7 @@ class DebDownloader(BaseDownloader):
             ret = os.path.join(self.dl_dir, dl_file)
             tmp_file = ".".join([ret, "tmp"])
             utils.run_shell_cmd(["rm", "-rf", tmp_file], logger)
-            (dl_url, alt_dl_url) = utils.get_download_url(url, CENGN_STRATEGY)
+            (dl_url, alt_dl_url) = utils.get_download_url(url, STX_MIRROR_STRATEGY)
             for i in range(1,retries+1):
                 if alt_dl_url:
                     try:
@@ -373,7 +382,7 @@ class DebDownloader(BaseDownloader):
                         if len(pkg_name_array) == 3:
                             url = pkg_name_array[2]
                             url_dict = utils.deb_file_name_to_dict(os.path.basename(url).replace("%2B", "+"))
-                            logger.debug("dkg_data: name=%s, ver=%s, url=%s, url_dict=%s, file=%s", pkg_name, pkg_ver, url,url,  str(url_dict), list_file)
+                            logger.debug("dkg_data: name=%s, ver=%s, url=%s, url_dict=%s, file=%s", pkg_name, pkg_ver, url, str(url_dict), list_file)
                             if url_dict['ver'] and url_dict['ver'] != pkg_ver:
                                 logger.warning("Package version mismatch for package %s, $s vs %s, in file %s", pkg_name, pkg_ver, url_dict['ver'], list_file)
                                 pkg_ver = url_dict['ver']
diff --git a/build-tools/stx/utils.py b/build-tools/stx/utils.py
index f2dbf015..e430101b 100755
--- a/build-tools/stx/utils.py
+++ b/build-tools/stx/utils.py
@@ -21,7 +21,16 @@ import subprocess
 import urllib.parse
 import urllib.request
 
-CENGN_BASE = os.path.join(os.environ.get('CENGNURL'), "debian")
+# The CENGNURL reference is retained for backward compatability 
+# with pre-existing build environmnets.
+CENGNURL = os.environ.get('CENGNURL')
+if CENGNURL:
+    CENGN_BASE = os.path.join(CENGNURL, "debian")
+STX_MIRROR_URL = os.environ.get('STX_MIRROR_URL')
+if STX_MIRROR_URL:
+    STX_MIRROR_BASE = os.path.join(STX_MIRROR_URL, "debian")
+if not STX_MIRROR_BASE:
+    STX_MIRROR_BASE=CENGN_BASE
 
 log_levels = {
     'debug': logging.DEBUG,
@@ -165,7 +174,7 @@ def run_shell_cmd(cmd, logger):
     return outs.strip()
 
 
-def url_to_cengn(url):
+def url_to_stx_mirror(url):
 
     url_change = urllib.parse.urlparse(url)
     url_path = pathlib.Path(url_change.path)
@@ -175,23 +184,23 @@ def url_to_cengn(url):
         path = url_path
 
     # FIXME: the ":" in a path is converted to "%25", after
-    # uploading to CENGN, the "%25" in the path is converted
+    # uploading to STX_MIRROR, the "%25" in the path is converted
     # to "%2525".
-    return os.path.join(CENGN_BASE, path).replace("%25", "%2525")
+    return os.path.join(STX_MIRROR_BASE, path).replace("%25", "%2525")
 
 
 def get_download_url(url, strategy):
 
     alt_rt_url = None
-    cengn_url = url_to_cengn(url)
-    if strategy == "cengn":
-        rt_url = cengn_url
+    stx_mirror_url = url_to_stx_mirror(url)
+    if strategy == "stx_mirror":
+        rt_url = stx_mirror_url
     elif strategy == "upstream":
-        rt_url = url
-    elif strategy == "cengn_first":
+        rt_url = urstx_mirror
+    elif strategy == "stx_mirror_first":
         try:
-            urllib.request.urlopen(cengn_url)
-            rt_url = cengn_url
+            urllib.request.urlopen(stx_mirror_url)
+            rt_url = stx_mirror_url
             alt_rt_url = url
         except:
             rt_url = url
@@ -199,11 +208,11 @@ def get_download_url(url, strategy):
         try:
             urllib.request.urlopen(url)
             rt_url = url
-            alt_rt_url = cengn_url
+            alt_rt_url = stx_mirror_url
         except:
-            rt_url = cengn_url
+            rt_url = stx_mirror_url
     else:
-        raise Exception(f'Invalid value "{strategy}" of CENGN_STRATEGY')
+        raise Exception(f'Invalid value "{strategy}" of STX_MIRROR_STRATEGY')
 
     return (rt_url, alt_rt_url)
 
diff --git a/build-tools/url_utils.sh b/build-tools/url_utils.sh
index 6f1d998b..35b55603 100755
--- a/build-tools/url_utils.sh
+++ b/build-tools/url_utils.sh
@@ -234,10 +234,10 @@ repo_url_to_sub_path () {
     return 0
 }
 
-CENGN_PROTOCOL="http"
-CENGN_HOST="mirror.starlingx.cengn.ca"
-CENGN_PORT="80"
-CENGN_URL_ROOT="mirror"
+STX_MIRROR_PROTOCOL="https"
+STX_MIRROR_HOST="mirror.starlingx.windriver.com"
+STX_MIRROR_PORT="80"
+STX_MIRROR_URL_ROOT="mirror"
 
 url_to_stx_mirror_url () {
     local URL="$1"
@@ -262,7 +262,7 @@ url_to_stx_mirror_url () {
         return 1
     fi
 
-    echo "$CENGN_PROTOCOL://$CENGN_HOST:$CENGN_PORT/$CENGN_URL_ROOT/$DISTRO/$URL_PATH"
+    echo "$STX_MIRROR_PROTOCOL://$STX_MIRROR_HOST:$STX_MIRROR_PORT/$STX_MIRROR_URL_ROOT/$DISTRO/$URL_PATH"
     return 0
 }