<div class="gmail_quote">On Mon, Jul 5, 2010 at 19:52, Sam Tobin-Hochstadt <<a href="mailto:samth@ccs.neu.edu">samth@ccs.neu.edu</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> This seems to work for me: #lang racket (require racket/runtime-path (for-syntax racket/file)) (define-runtime-path-list p (find-files (ë (x) (regexp-match "[.]tex$" x)))) Probably you were missing the `for-syntax' require. </blockquote><div> Ah, that is why! Thanks a lot! Now another question: I'm in fact using `find-files' inside a function, say `find-files-ex', that is declared in the same file and used in the `define-runtime-path-list' call. The problem is that this function must be available both at compile time and at runtime because of `define-runtime-path-list'. I did not find anything that could do that as is, so I made this macro: (define-syntax-rule (define-also-for-syntax head body ...) (begin (define-for-syntax head body ...) (define head body ...) )) to avoid duplication of the function code. But I feel like it may not be the right thing to do. Am I missing something? </div></div>