((nil . ((eval . (when (and (buffer-file-name)
                          (file-regular-p (buffer-file-name))
                          (string-match-p "^[^.]" (buffer-file-name)))
                 (emacs-lisp-mode)
                 (unless (featurep 'package-build)
                   (let ((load-path (cons ".." load-path)))
                     (require 'package-build)))
                 (package-build-minor-mode))))))