diff --git a/python-packaging.changes b/python-packaging.changes
index ca56d5a..09e5ac9 100644
--- a/python-packaging.changes
+++ b/python-packaging.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Thu Mar  9 16:39:58 UTC 2023 - Dirk Müller <dmueller@suse.com>
+
+- Don't use :primary multibuild flavor for non-Tumbleweed
+  * accomodates special SLE15 projects defininig extra flavors but
+    not building for primary python3
+
 -------------------------------------------------------------------
 Fri Jan 13 15:27:09 UTC 2023 - Ben Greiner <code@bnavigator.de>
 
diff --git a/python-packaging.spec b/python-packaging.spec
index 46ce291..ea0f3e7 100644
--- a/python-packaging.spec
+++ b/python-packaging.spec
@@ -20,6 +20,7 @@
 # in order to avoid rewriting for subpackage generator
 %define mypython python
 %global flavor @BUILD_FLAVOR@%{nil}
+%if 0%{?suse_version} >= 1550
 %if "%{flavor}" == "primary"
 # this one is goes into Ring0:  Bootstrap for primary python stack
 %define pprefix %{primary_python}
@@ -33,6 +34,15 @@
 %{expand:%%define skip_%{primary_python} 1}
 BuildRequires:  python3-packaging
 %endif
+%else
+# backport and option d projects for 15.X having one or more python in the buildset don't need the Ring split for bootstrap
+%if "%{flavor}" == "primary"
+%define python_module() invalid-multibuild-flavor-for-15.X
+ExclusiveArch:  do-not-build
+%else
+%define pprefix python
+%endif
+%endif
 %if "%{flavor}" == "test"
 %define pprefix python
 %define psuffix -test