Made it a module.

Put it in any directory, run guile -L . and then import (goof) in that directory.

helpers.scm

@@ -1,13 +0,0 @@
-(define-module (helpers)
-  #:export (define-aux-syntax define-aux-syntaxes))
-
-(define-syntax define-aux-syntax
-  (lambda (stx)
-    (syntax-case stx ()
-      ((_ name)
-       #'(define-syntax name
-           (lambda (stx)
-             (syntax-violation 'name "Loop clause used outside of loop macro" stx)))))))
-(define-syntax-rule (define-aux-syntaxes name ...)
-  (begin
-    (define-aux-syntax name) ...))