diff --git a/python310.changes b/python310.changes
index 57e429c..26c4492 100644
--- a/python310.changes
+++ b/python310.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu Jul 21 14:19:52 UTC 2022 - Matej Cepl <mcepl@suse.com>
+
+- Switch from %primary_interpreter to prjconf-defined
+  %primary_python (gh#openSUSE/python-rpm-macros#127).
+
 -------------------------------------------------------------------
 Thu Jun  9 16:43:30 UTC 2022 - Matej Cepl <mcepl@suse.com>
 
diff --git a/python310.spec b/python310.spec
index 7f7da63..90b3d75 100644
--- a/python310.spec
+++ b/python310.spec
@@ -36,6 +36,13 @@
 %bcond_without general
 %endif
 
+%define         python_pkg_name python310
+%if "%{python_pkg_name}" == "%{primary_python}"
+%define primary_interpreter 1
+%else
+%define primary_interpreter 0
+%endif
+
 %if 0%{?sle_version} && 0%{?suse_version} < 1550
 # Obsoleting previous "latest" Python versions
 # Next versions will get more lines like for older versions
@@ -59,14 +66,6 @@ Obsoletes:      python39%{?1:-%{1}}
 %else
 %define tarversion %{version}
 %endif
-%define         python_pkg_name python310
-# Will provide the python3-* provides
-# Will do the /usr/bin/python3 and all the core links
-%if 0%{?sle_version} || 0%{?suse_version} < 1550
-%define primary_interpreter 0
-%else
-%define primary_interpreter 1
-%endif
 # We don't process beta signs well
 %define         folderversion 3.10.5
 %define         tarname    Python-%{tarversion}