Writing a basic service for GNU Guix

A developer walks through building a custom GNU Guix system service for kmonad—yes, the keyboard remapper—by wiring up a new service-type that plugs into Shepherd and account-service-type.

To get there, they lift patterns from services like wesnothd, use make-forkexec-constructor to spin up the daemon, and define the right user/group accounts so the whole thing boots cleanly under Guix.