(lambda (request failure)
  (case request
    [(name) "stepper"]
    [(compile-prefix) 
     '(begin
        (require-library "sig.ss" "stepper")
        (require-library "sigs.ss" "zodiac")
        (require-library "cores.ss"))]
    [(compile-omit-files) 
     `("test.ss" "testr.ss" "sig.ss")]
    [else (failure)]))
