In order to make the generated auto-autoload files also work with XEmacs-20.{3,4}, I would suggest to add the following line as the first line of each generated auto-autoload file: (unless (fboundp 'package-provide) (fset 'package-provide 'ignore)) You might say that these files are not supposed to be loaded by XEmacs-20.3, but the point is: XEmacs-20.3 *does* load files in ~/.xemacs/lisp/*/ automatically. And if someone (e.g., package authors) want to use both XEmacs-20 and XEmacs-21, the files in these directories should work with both XEmacs-20 and XEmacs-21. (Well, they don't because files with some macros compiled in XEmacs-21 don't run in XEmacs-20, but that is another story...) - Christoph