+%if %{with_lua}
+%{!?lua_version: %define lua_version %(lua -v 2>&1 | cut -f2 -d' ' | cut -f1,2 -d '.')}
+
+%package lua
+Summary: Lua RRDtool bindings
+Group: Development/Languages
+BuildRequires: lua-devel
+Requires: lua
+Requires: %{name} = %{version}-%{release}
+
+%description lua
+The %{name}-lua package includes RRDtool bindings for Lua.
+%endif
+