Created attachment 294083 [details] live ebuild live ebuild
Looks like a candidate for the Emacs overlay to me. (Generally, we avoid live ebuilds in the app-emacs category in the main tree.)
Committed to Emacs overlay: <https://overlays.gentoo.org/proj/emacs/browser/emacs-overlay/app-emacs/org-mode> I had to add a couple of build-time dependencies that are needed for the "pdf" and "card" make targets.