-%ruby_rubylibdir %{expand:%%global ruby_rubylibdir %(%{__ruby} -r rbconfig -e 'print RbConfig::CONFIG["rubylibdir"]' 2>/dev/null || echo ERROR)}%ruby_rubylibdir
-%ruby_vendorarchdir %{expand:%%global ruby_vendorarchdir %(%{__ruby} -r rbconfig -e 'print RbConfig::CONFIG["vendorarchdir"]' 2>/dev/null || echo ERROR)}%ruby_vendorarchdir
-%ruby_vendorlibdir %{expand:%%global ruby_vendorlibdir %(%{__ruby} -r rbconfig -e 'print RbConfig::CONFIG["vendorlibdir"]' 2>/dev/null || echo ERROR)}%ruby_vendorlibdir
-%ruby_sitearchdir %{expand:%%global ruby_sitearchdir %(%{__ruby} -r rbconfig -e 'print RbConfig::CONFIG["sitearchdir"]' 2>/dev/null || echo ERROR)}%ruby_sitearchdir
-%ruby_sitedir %{expand:%%global ruby_sitedir %(%{__ruby} -r rbconfig -e 'print RbConfig::CONFIG["sitedir"]' 2>/dev/null || echo ERROR)}%ruby_sitedir
-%ruby_sitelibdir %{expand:%%global ruby_sitelibdir %(%{__ruby} -r rbconfig -e 'print RbConfig::CONFIG["sitelibdir"]' 2>/dev/null || echo ERROR)}%ruby_sitelibdir
+%ruby_rubylibdir %{expand:%%global ruby_rubylibdir %{__ruby_rbconfig rubylibdir}}%ruby_rubylibdir
+%ruby_vendorarchdir %{expand:%%global ruby_vendorarchdir %{__ruby_rbconfig vendorarchdir}}%ruby_vendorarchdir
+%ruby_vendorlibdir %{expand:%%global ruby_vendorlibdir %{__ruby_rbconfig vendorlibdir}}%ruby_vendorlibdir
+%ruby_sitearchdir %{expand:%%global ruby_sitearchdir %{__ruby_rbconfig sitearchdir}}%ruby_sitearchdir
+%ruby_sitedir %{expand:%%global ruby_sitedir %{__ruby_rbconfig sitedir}}%ruby_sitedir
+%ruby_sitelibdir %{expand:%%global ruby_sitelibdir %{__ruby_rbconfig sitelibdir}}%ruby_sitelibdir