bug#45781: Emacs packages not visible out of the box

[Ludovic Courtès]

Hi!

Consider this Emacs:

  guix environment -E DISPLAY --expose=/tmp/.X11-unix \
    --ad-hoc -C emacs emacs-geiser emacs-guix guile \
    -- emacs -Q

Things like M-x run-guile (from Geiser) or M-x guix are not accessible
by default.  I have to explicitly (require 'geiser) etc. to get them.

It seems to me that it used to be the case that Emacs packages were
readily usable in fresh environments, no?  Did something change
recently?

That’s with:

--8<---------------cut here---------------start------------->8---
$ guix describe
Generacio 171   Jan 11 2021 11:38:39    (nuna)
  guix 458cb25
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 458cb25b9e7e7c954f468023abea2bebb5d8c75b
--8<---------------cut here---------------end--------------->8---

Ludo’.