Do not use platform_py_build macro when platform_python is not enabled. Because platform-python-rpm-macros is not installed.

python-coverage.spec

@@ -117,7 +117,9 @@ sed -i 's/\r//g' README.rst
 %py3_build
 %endif # if with python3
 
+%if %{with platform_python}
 %platform_py_build
+%endif
 
 %install
 %if %{with platform_python}
@@ -216,7 +218,7 @@ popd
 * Fri Dec 09 2016 Charalampos Stratakis <cstratak@redhat.com> - 4.2-2
 - Rebuild for Python 3.6
 
-* Fri Jul 19 2016 Tom Callaway <spot@fedoraproject.org> - 4.2-1
+* Fri Jul 29 2016 Tom Callaway <spot@fedoraproject.org> - 4.2-1
 - 4.2 final
 
 * Tue Jul 19 2016 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.2-0.2.b1