[[info:shepherd][The Shepherd manual]] suggests that you use a single =init.scm=, but as is pointed out by this article about [[https://guix.gnu.org/en/blog/2020/gnu-shepherd-user-services/][GNU Shepherd user services]] it might be better to have the services in separate files so you can restart them individually if you make any changes to them. So I just put a loading script into =init.scm= that goes through the =init.d= directory and loads each service defined in there.
I can't use ~(current-filename)~ here because this file will be symlinked into the =$XDG_CONFIG_DIR/shepherd/init.scm= and the =current-filename= function will return the actual path, not the path of the symbolic link.