Hello! MELL is a M Emacs Lisp Library. This package is required by prime-el. I suggest app-emacs/mell. Please test. Thank you.
Created attachment 19467 [details] mell-1.0.0.ebuild
Created attachment 19468 [details] 50mell-gentoo.el
Sorry for committing late. It's in CVS now. Thanks for your contribution.