executable-find not found

Вот, при попытке doxymacs-lookup выдается Symbol's function definition is void: executable-find Вот стэк-трейс: Signaling: (void-function executable-find) executable-find("gnome-moz-remote") browse-url-default-browser(".//classbcs_1_1LoadInfoPacket.html#a0" nil) apply(browse-url-default-browser ".//classbcs_1_1LoadInfoPacket.html#a0" nil) browse-url(".//classbcs_1_1LoadInfoPacket.html#a0") doxymacs-display-url("classbcs_1_1LoadInfoPacket.html#a0") (if url (doxymacs-display-url url)) (let ((url ...)) (if url (doxymacs-display-url url))) (lambda (symbol) "Look up the symbol under the cursor in Doxygen generated documentation." (interactive (save-excursion ... ...)) (let (...) (if url ...)))("LoadInfoPacket") call-interactively(doxymacs-lookup) Кто виноват, и что, типа делать?