;; give up with a useful (?) error message
(unless (find-system 'asdf-system-connections nil)
(error "The CL-Graph system requires ASDF-SYSTEM-CONNECTIONS. See
;; give up with a useful (?) error message
(unless (find-system 'asdf-system-connections nil)
(error "The CL-Graph system requires ASDF-SYSTEM-CONNECTIONS. See