diff --git a/python-tinycss2.spec b/python-tinycss2.spec
index 7bd7d3e..d8ad62a 100644
--- a/python-tinycss2.spec
+++ b/python-tinycss2.spec
@@ -1,7 +1,7 @@
 %define pkgname %(echo %name | cut -d- -f2- | tr - _)
 Name:          python-tinycss2
 Version:       1.2.1
-Release:       1mamba
+Release:       2mamba
 Summary:       A tiny CSS parser
 Group:         System/Libraries
 Vendor:        openmamba
@@ -14,7 +14,7 @@ License:       BSD
 BuildRequires: libpython3-devel
 BuildRequires: python3.7dist(webencodings)
 ## AUTOBUILDREQ-END
-BuildRequires: python-pyproject2setuppy-py3
+#BuildRequires: python-pyproject2setuppy-py3
 
 %description
 %{summary}.
@@ -27,26 +27,25 @@ BuildRequires: python-pyproject2setuppy-py3
 %setup -q -n tinycss2-%{version}
 
 %build
-CFLAGS="%{optflags}" %{__python} -m pyproject2setuppy build
+CFLAGS="%{optflags}" %{__python} -m build --no-isolation --wheel
+#CFLAGS="%{optflags}" %{__python} -m pyproject2setuppy build
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
-%{__python} -m pyproject2setuppy install \
-   -O1 --skip-build \
-   --root="%{buildroot}" \
-   --install-headers=%{python_inc} \
-   --install-lib=%{python_sitearch} \
-   --record=%{name}.filelist
+%{__python} -m installer --destdir=%{buildroot} dist/*.whl
 
-sed -i "\,\.egg-info/,d;s,.*/man/.*,&.gz," %{name}.filelist
-
-%files %{?pyappend} -f %{name}.filelist
+%files %{?pyappend}
 %defattr(-,root,root)
-%dir %{python_sitearch}/%{pkgname}-%{version}-py*.egg-info
-%{python_sitearch}/%{pkgname}-%{version}-py*.egg-info/*
+%dir %{python_sitelib}/%{pkgname}-%{version}.dist-info
+%{python_sitelib}/%{pkgname}-%{version}.dist-info/*
+%dir %{python_sitelib}/%{pkgname}
+%{python_sitelib}/%{pkgname}/*
 %doc LICENSE
 
 %changelog
+* Wed Mar 22 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 1.2.1-2mamba
+- rebuilt with python 3.10
+
 * Tue Oct 18 2022 Automatic Build System <autodist@mambasoft.it> 1.2.1-1mamba
 - automatic version update by autodist