Hey,
I had this issue when rebuilding a sway configuration.
also the nixos guix package is broken.
I have a nixos setup, and although guix seems easier to use, I don’t think it’s at a level to use as a daily driver.
Guix pull doesn’t even work
I asked about how to get fish working properly here and no one answered. So, I would suggest moving to a distro that you can use while learning guix.
There isn’t the community available to support noobs is my feeling.
All the best!