Why do we use ".../share/emacs/site-lisp/guix.d/"?

[Alex Kost]

I should have asked this when emacs-build-system was introduced.  Why
does it put emacs packages in sub-directories of
"/share/emacs/site-lisp/guix.d"?  It looks more natural to me just to
use "/share/emacs/site-lisp".

I don't see any potential conflicts here: some packages will put their
elisp files right in the site-lisp dir (gnu-build-system does it by
default), and emacs-build-system can just use
"/share/emacs/site-lisp/<package>" sub-directories.

"guix.d" seems redundant to me.  What do people think?

-- 
Alex