The $lib output refers to the terminfo database in $out, which is about
10x larger than the ncurses shared library. Splitting these outputs
saves a small amount of space for any derivations that use the terminfo
database but not the ncurses library, but we do not have evidence that
any such exist.
I didn't see nice patches to apply,
so I exchanged the whole source (-> autoreconf).
/cc maintainer: k0ral. BTW, it's practical to have the maintainers attribute
match the github name exactly so that people know how to /cc you.