bug#73428: update elogind to 255

[Julian Flake]

Hi,

> ...or, if you need additional channels or can't get this to 
> work, you
> can commit your changes, replace the guix channel URL with
> "file:///home/your/guix", guix pull
> --{allow-downgrades,disable-authentication}, and reconfigure as 
> you
> would otherwise.

that's actually exactly, what I started this morning. Building all 
the packages takes a lot of time (and is still running), of 
course.