diff --git a/system_setup/install.sh b/system_setup/install.sh
index c201a3b..d8e0e9b 100755
--- a/system_setup/install.sh
+++ b/system_setup/install.sh
@@ -361,8 +361,12 @@ if [[ -n "$EXISTING_OEMDRV_DEV" ]]; then
         fi
 
         if [[ -f "$MOUNT_POINT/system_setup/setup_system.inc.sh" && -f "$MOUNT_POINT/config/setup_system.conf" ]]; then
+            if [ ! -z $REPO_URL ]; then BACK_REPO_URL="$REPO_URL"; fi
+            if [ ! -z $REPO_BRANCH ]; then BACK_REPO_BRANCH="$REPO_BRANCH"; fi
             info "Reading existing configuration from ${MOUNT_POINT} ..."
             source "$MOUNT_POINT/system_setup/setup_system.inc.sh"
+            if [ ! -z $BACK_REPO_URL ]; then REPO_URL="$BACK_REPO_URL"; fi
+            if [ ! -z $BACK_REPO_BRANCH ]; then REPO_BRANCH="$BACK_REPO_BRANCH"; fi
         fi
 
         # ── Check existing git repository origin ──────────────────────────────