guix describe : Generation 139 Nov 19 2019 08:11:32 (current) guix 7b40d59 repository URL: https://git.savannah.gnu.org/git/guix.git branch: master commit: 7b40d59114e1462d6d8140f325a66b12e91db667
emacs --version : GNU Emacs 26.3 Copyright (C) 2019 Free Software Foundation, Inc. GNU Emacs comes with ABSOLUTELY NO WARRANTY. You may redistribute copies of GNU Emacs under the terms of the GNU General Public License. For more information about these matters, see the file named COPYING. When I launch emacs from the command line, I get the following message: split-string: Wrong type argument: stringp, nil As a result, when I try `EDITOR=emacs guix edit hello` it doesn't work. I can confirm this is not a problem with guix edit, because when EDITOR=vim it opens the package in vim. (Joke about guix turning to the dark side goes here.) Since I do not know if it is a problem with guix or emacs, I'm starting with guix. It could be related to bug#38261