For context, see #156 (comment):

Studying the deploy log I realized, that git submodules still get checked out. This doesn't do any harm, but it is not necessary either. Maybe this can be corrected? If so, I think we should open a separate ticket for this.

From #156 (comment):

OK, so the build instruction on Netlify is currently:

cd themes/docsy && git submodule update -f --init && cd ../.. && hugo

So will automatically check out the submodules. With Hugo Modules will it just work by running hugo?

/cc @deining @LisaFC