Reported by Christopher Allan Webber <cwebber@dustycloud.org> on #guix.
Several modules use the code from 'guix-profiles' without requiring it. It
was never noticed before commits e4e2154644
and 13fe4891fa, because 'guix-emacs' required
this module. But now, when 'site-start.el' loads 'guix-emacs',
'guix-profiles' may not exist yet, so it may not be required. This will
lead to an error when some of "M-x guix-..." commands will be used. See
<https://gnunet.org/bot/log/guix/2016-02-03#T898859>.
* emacs/guix-base.el: Require 'guix-profiles'.
* emacs/guix-ui.el: Likewise.
* emacs/guix-ui-generation.el: Likewise.
* emacs/guix-ui-package.el: Likewise.
e20f051ec4