?

Well, I do not know exactly if fixing your issue does not introduce
regression.

About emacs-guix, instead of launching Guile, why not start “guix
repl” instead?  The command “guix repl” had been improved – and maybe
even introduced after the release of emacs-guix.  Somehow, I am not very
happy with the current integration between Geiser and Guix. :-)

Cheers,
simon