>> Okay, as of now it looks like one cannot add any other repos; the
>> doc says:
>> ;; This code supports a single package repository, ELPA.
>Not sure what definition of "now" you're using, ...
Well, I wrote that under the apparently erroneous impression that
the version I downloaded by following the instructions given in
tromey.com/elpa/install.html was the latest/"official" version of
% head ~/.emacs.d/elpa/package.el
;;; package.el --- Simple package system for Emacs
;; Author: Tom Tromey <tromey@redh...>
;; Created: 10 Mar 2007
;; Version: 0.9
;; Keywords: tools
;; This file is not (yet) part of GNU Emacs.
(This thread inadvertently/amusingly/ironically illustrates the
situation that motivated the initial query in the first place:
using publicly available Emacs extensions can be a lot trickier
than one might think...)