arraymancer.nim, which imports and exports all submodules. But due to how nim imports work, I think one cannot actually import only parts of arraymancer, e.g.
import arraymancer / tensorjust doesn't work for some reason.
src/directory directly. So like
arraymancer.nimis also sitting there, which just imports those submodules and exports them.
srcapproach as long as nimble eats the directory, @Vindaar and me had troubles with that