diff --git a/python-bottle.spec b/python-bottle.spec
index 7079787..c007a04 100644
--- a/python-bottle.spec
+++ b/python-bottle.spec
@@ -1,6 +1,6 @@
 Name:          python-bottle
 Version:       0.12.19
-Release:       2mamba
+Release:       3mamba
 Summary:       Fast and simple WSGI-framework for small web-applications
 Group:         System/Libraries
 Vendor:        openmamba
@@ -17,6 +17,8 @@ BuildRequires: libpython3-devel
 %{summary}.
 
 %if 0%{?with_pyver}
+%define py_requires_append \
+Obsoletes:     python-bottle <= 0.12.19-2mamba
 %pyver_package
 %endif
 
@@ -37,12 +39,15 @@ CFLAGS="%{optflags}" %{__python} setup.py build
 
 sed -i "\,\.egg-info/,d;s,.*/man/.*,&.gz," %{name}.filelist
 
-%files -f %{name}.filelist
+%files %{?pyappend} -f %{name}.filelist
 %defattr(-,root,root)
 %dir %{python_sitearch}/bottle-%{version}-py*.egg-info
 %{python_sitearch}/bottle-%{version}-py*.egg-info/*
 
 %changelog
+* Tue Aug 31 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 0.12.19-3mamba
+- fix missing pyappend in build packages name
+
 * Mon Aug 30 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 0.12.19-2mamba
 - rebuilt with distdeps and for python3