@Marek Paśnikowski Yes, this patch set does include a service: https://notabug.org/Brendan/guix/src/kde-updates/gnu/services/desktop.scm#L1363

I'd also love to help out with this effort and I can also help with bug reporting and testing builds. On the mailing list two weeks ago, Hartmut Goebel mentioned that he had worked on packaging Plasma for Guix about a year ago, but he was unable to get the Plasma desktop to actually start. (https://lists.gnu.org/archive/html/guix-devel/2022-05/msg00014.html) Have you guys been able to get the desktop to start?