(module truc (coucou)
(import scheme)
(define (coucou)
  `(display "coucou\n")))

(module bidule (blah)
(import scheme chicken)
(import-for-syntax truc)
(define-syntax blah
  (er-macro-transformer
    (lambda (f r c)
      (coucou)))))

(import bidule)

(blah)