Ah. I was updating the OpenBSD package, which specifies LUA_CFLAGS and LUA_LIBS
manually, which is why the checks didn't trigger.

Using Lua 5.2 fixes the problem.

Some other changes of note... GNU Make is now required and wasn't before
(${shell foo}, export, and define are not portable Make).

Do the localization scripts really need GNU awk specifically? Can they get by
with One True awk?