diff --git a/scons.spec b/scons.spec
index 9334f99..68a1930 100644
--- a/scons.spec
+++ b/scons.spec
@@ -1,6 +1,6 @@
 Name:          scons
 Version:       3.1.2
-Release:       1mamba
+Release:       2mamba
 Summary:       An Open Source software construction tool
 Group:         Development/Tools
 Vendor:        openmamba
@@ -9,10 +9,10 @@ Packager:      Stefano Cotta Ramusino <stefano.cotta@openmamba.org>
 URL:           http://www.scons.org/
 Source:        http://downloads.sourceforge.net/scons/%{version}/scons-%{version}.tar.gz
 License:       MIT
-Requires:      python >= %python_version
+Requires:      python3 >= %python3_version
 ## AUTOBUILDREQ-BEGIN
-BuildRequires: libpython-devel
-BuildRequires: python
+BuildRequires: libpython3-devel
+BuildRequires: python3
 ## AUTOBUILDREQ-END
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
@@ -28,15 +28,17 @@ SCons supports side-by-side variant builds, and is easily extended with user-def
 %prep
 %setup -q
 
+sed -i "s|env python$|env python3|" script/scons*
+
 %build
-%{__python} setup.py build
+%{__python3} setup.py build
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
-%{__python} setup.py install \
+%{__python3} setup.py install \
    --root="%{buildroot}" \
-   --install-headers=%{_includedir}/python \
-   --install-lib=%{python_sitearch} \
+   --install-headers=%{python3_inc} \
+   --install-lib=%{python3_sitearch} \
    --install-data=%{_datadir} \
    --record=.packlist
 
@@ -52,6 +54,9 @@ rm -f .packlist
 %doc LICENSE.txt
 
 %changelog
+* Wed Mar 18 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 3.1.2-2mamba
+- rebuilt with python3
+
 * Tue Dec 31 2019 Automatic Build System <autodist@mambasoft.it> 3.1.2-1mamba
 - automatic version update by autodist