I finally managed to get it all running. Guix packaging works when using a full .guix/modules/gwwm-packages.scm declaring all your packages together (following Guix's Cookbook The Repository as a Channel). Once packaging with guix shell worked, the last fix to run it was this patch.
Now guix shell -L $PWD/.guix/modules gwwm -- gwwm works.
Thanks again for all these repos!
I finally managed to get it all running. Guix packaging works when using a full .guix/modules/gwwm-packages.scm declaring all your packages together (following Guix's Cookbook The Repository as a Channel). Once packaging with guix shell worked, the last fix to run it was this patch.
Now
guix shell -L $PWD/.guix/modules gwwm -- gwwm
works.