Use proper %python2_sitelib macro.

mathgl.spec

@@ -19,7 +19,7 @@
 
 Name:          mathgl
 Version:       2.4.1
-Release:       8%{?dist}
+Release:       9%{?dist}
 Summary:       Cross-platform library for making high-quality scientific graphics
 Summary(de):   Plattformübergreifende Bibliothek für hochwertige wissenschaftliche Graphiken
 Summary(ru):   Библиотека для осуществления высококачественной визуализации данных
@@ -633,7 +633,7 @@ fi
 %dir %{_datadir}/udav/
 
 %files -n python2-mathgl
-%{python_sitelib}/*
+%{python2_sitelib}/*
 
 %files -n python3-mathgl
 %{python3_sitelib}/*
@@ -689,6 +689,9 @@ fi
 %endif
 
 %changelog
+* Fri Jul 20 2018 Jason L Tibbitts III <tibbs@math.uh.edu> - 2.4.1-9
+- Use proper %%python2_sitelib macro.
+
 * Fri Jul 13 2018 Fedora Release Engineering <releng@fedoraproject.org> - 2.4.1-8
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild