(with-eval-after-load 'notmuch
  (defun my-notmuch-search-list-emacs-bug ()
    "Notmuch saved search 'List: Emacs Bug'."
    '(and (tag unread)
          (or (from "bug-gnu-emacs@gnu.org")
              (from "help-debbugs@gnu.org")
              (from "@debbugs.gnu.org")
              (to "@debbugs.gnu.org")
              (list "bug-gnu-emacs.gnu.org")))))