Is anybody actually using Guix? It doesn't seem possible at all to use Xorg without a login manager. I like to log into the console and type startx and I don't want to start using a login manager. I only use a few graphical programs: dwm, emacs-x11, a web browser, mpv to watch the movies, feh to see images, mupdf to read pdfs and cmus to listen to music. That's about it.
From the user manual:
Support for the X Window graphical display system—specifically Xorg—is provided by the (gnu services xorg) module. Note that there is no xorg-service procedure. Instead, the X server is started by the login manager, by default the GNOME Display Manager (GDM).
To use X11, you must install at least one window manager—for example the windowmaker or openbox packages—preferably by adding it to the packages field of your operating system definition
It's not a big deal but I find it slightly annoying.
I tried exwm and while it seems very nice, I'm really not sure letting the mono-threaded emacs managing windows is a good idea.