gistfile1.txt

#lang racket/load

(define bar-mod
  '(module bar racket
     (begin-for-syntax
       (with-handlers ([exn:fail? (lambda (e) #f)])
         (set-box!
          (dynamic-require ''foo 'da-box)
          42)))))

(define da-global-box (box '()))
(define (da-box)
  da-global-box)
(define foo-mod
  #`(module foo racket
      (provide da-box)
      (define da-box ((syntax-e #'#,da-box)))))

(eval foo-mod)
(eval bar-mod)
(displayln da-global-box)