Thank you for this! Missing KDE is a dealbreaker for primary system, but I can start using nonguix for older systems now.

Edit: I'm not sure if I'm reading this right, but the job says 0 builds (eg. https://mirror.brielmaier.net/eval/97958?status=succeeded&pa...). I'm not familiar with how guix works, but where can I see list of actual built derivations for a particular job?