(when (ignore-errors (find-class 'load-compiled-op))
(defmethod perform :after ((op load-compiled-op) (c (eql (find-system :postoffice))))
(pushnew :postoffice cl:*features*)))
(when (ignore-errors (find-class 'load-compiled-op))
(defmethod perform :after ((op load-compiled-op) (c (eql (find-system :postoffice))))
(pushnew :postoffice cl:*features*)))