et)
  "Run a test of an OS running RPC-SERVICE, which should create SOCKET."
  (define os
    (marionette-operating-system
     %base-os
     #:imported-modules '((gnu services herd)
                          (guix combinators))))

  (define test
    (with-imported-modules '((gnu build marionette))
      #~(begin
          (use-modules (gnu build marionette)
                       (srfi srfi-64))

          (define marionette
            (make-marionette (list #$(virtual-machine os))))

          (define (wait-for-socket file)
            ;; Wait until SOCKET  exists in the guest
            (marionette-eval
             `(let loop ((i 10))
                (cond ((and (file-exists? ,file)
                            (eq? 'socket (stat:type (stat ,file))))
                       #t)
                      ((> i 0)
                       (sleep 1)
                       (loop (- i 1)))
                      (else
                       (error "Socket didn't show up: " ,file))))
             marionette))

          (mkdir #$output)
          (chdir #$output)

          (test-begin "rpc-daemon")

          ;; Wait for the rpcbind daemon to be up and running.
          (test-eq "RPC service running"
            'running!
            (marionette-eval
             '(begin
                (use-modules (gnu services herd))
                (start-service 'rpcbind-daemon)