diff --git a/python-dnspython-py27.spec b/python-dnspython-py27.spec
index a149702..8dddc02 100644
--- a/python-dnspython-py27.spec
+++ b/python-dnspython-py27.spec
@@ -1,6 +1,6 @@
 Name:          python-dnspython-py27
 Version:       1.10.0
-Release:       3mamba
+Release:       4mamba
 Summary:       dnspython is a DNS toolkit for Python
 Group:         System/Libraries
 Vendor:        openmamba
@@ -13,6 +13,7 @@ License:       BSD
 BuildRequires: libpython27-devel
 ## AUTOBUILDREQ-END
 Provides:      dnspython
+Obsoletes:     dnspython <= 1.10.0-2mamba
 
 %description
 dnspython is a DNS toolkit for Python. It supports almost all record types. It can be used for queries, zone transfers, and dynamic updates. It supports TSIG authenticated messages and EDNS0.
@@ -22,22 +23,24 @@ dnspython provides both high and low level access to DNS. The high level classes
 %setup -q -n dnspython-%{version}
 
 %build
-CFLAGS="%{optflags}" %{__python} setup.py build
+CFLAGS="%{optflags}" %{__python27} setup.py build
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
-%{__python} setup.py install \
+%{__python27} setup.py install \
    -O1 --skip-build \
    --root="%{buildroot}" \
-   --install-headers=%{_includedir}/python \
-   --install-lib=%{python_sitearch}  \
+   --install-lib=%{python27_sitearch}  \
    --record=%{name}.filelist
 
 %files -f %{name}.filelist
 %defattr(-,root,root)
-%{python_sitearch}/dnspython-%{version}-py%{python_version}.egg-info
+%{python27_sitearch}/dnspython-%{version}-py%{python27_version}.egg-info
 
 %changelog
+* Thu Sep 21 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 1.10.0-4mamba
+- obsolete dnspython
+
 * Sun Nov 28 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 1.10.0-3mamba
 - restore as py27 legacy package for mailman 2