diff --git a/python-virtualenv.changes b/python-virtualenv.changes
index 278c691..7ea2be6 100644
--- a/python-virtualenv.changes
+++ b/python-virtualenv.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Jul 29 14:39:38 UTC 2013 - speilicke@suse.com
+
+- Use update-alternatives for parallel-installability with Python3 version
+
 -------------------------------------------------------------------
 Mon Jul 29 14:29:55 UTC 2013 - speilicke@suse.com
 
diff --git a/python-virtualenv.spec b/python-virtualenv.spec
index 9a02f2d..c56641b 100644
--- a/python-virtualenv.spec
+++ b/python-virtualenv.spec
@@ -30,6 +30,8 @@ BuildRequires:  python-devel
 BuildRequires:  python-Sphinx
 Requires:       python-pip
 Requires:       python-setuptools
+Requires(post): update-alternatives
+Requires(postun): update-alternatives
 %if 0%{?suse_version} && 0%{?suse_version} <= 1110
 %{!?python_sitelib: %global python_sitelib %(python -c "from distutils.sysconfig import get_python_lib; print get_python_lib()")}
 %else
@@ -64,15 +66,31 @@ rm virtualenv_support/*.gz  # Remove in-tree libraries that are available as pac
 
 %build
 python setup.py build
-python setup.py build_sphinx
+python setup.py build_sphinx && rm build/sphinx/html/.buildinfo
 
 %install
 python setup.py install --prefix=%{_prefix} --root=%{buildroot}
 
+%pre
+# Since /usr/bin/virtualenv became ghosted to be used with update-alternatives, we have to
+# get rid of the old binary resulting from the non-update-alternativies-ified package:
+[[ ! -L %{_bindir}/virtualenv ]] && rm -f %{_bindir}/virtualenv
+exit 0
+
+%post
+update-alternatives \
+    --install %{_bindir}/virtualenv virtualenv %{_bindir}/virtualenv-%{py_ver} 20 
+
+%preun
+if [ $1 -eq 0 ] ; then
+    update-alternatives --remove virtualenv %{_bindir}/virtualenv-%{py_ver}
+fi
+
 %files
 %defattr(-,root,root,-)
 %doc LICENSE.txt README.rst build/sphinx/html
-%{_bindir}/virtualenv*
+%ghost %{_bindir}/virtualenv
+%{_bindir}/virtualenv-%{py_ver}
 %{python_sitelib}/virtualenv*
 
 %changelog