After upgrading from emacs-27.2 to emacs-28.1 on a Guix system, opening
files/directories via sudo using tramp no longer works.
Here's what's in the *Messages* buffer:
Toggle quote (4 lines)
> Tramp: Opening connection nil for root@remq240 using sudo...done
> File error: Couldn't find a proper `ls' command [6 times]
> tramp-error: Couldn't find a proper `ls' command
I am at:
Toggle quote (6 lines)
> Generation 48 May 15 2022 16:38:54 (current)
> guix 9860c90
> repository URL: https://git.savannah.gnu.org/git/guix.git
> branch: master
> commit: 9860c90e8e5362e0e843efbd45f4563b9746a196
Logging out after upgrade does not help.