diff --git a/hyphenate/hyphenate/private/bootstrap.rkt b/hyphenate/hyphenate/private/bootstrap.rkt
index 8614510b..610ca6d6 100644
--- a/hyphenate/hyphenate/private/bootstrap.rkt
+++ b/hyphenate/hyphenate/private/bootstrap.rkt
@@ -1,50 +1,60 @@
 #lang racket/base
-(require (for-syntax racket/base syntax/strip-context))
+(require (for-syntax racket/base syntax/strip-context)
+         txexpr/base
+         sugar/define
+         racket/contract
+         (only-in xml xexpr/c)
+         (prefix-in core: hyphenate/private/core))
+
 (provide build-main)
 
+;; An exception-word is a string of word characters or hyphens.
+(define (exception-word? x)
+  (and (string? x) (regexp-match #px"^(\\p{L}|-)+$" x) #t))
+(define (exception-words? xs) 
+  (and (list? xs) (andmap exception-word? xs)))
+
+(define hyphenate/c
+  ((xexpr?) ((or/c char? string?) 
+             #:exceptions exception-words? 
+             #:min-length (or/c integer? #f)
+             #:omit-word (string? . -> . any/c)
+             #:omit-string (string? . -> . any/c)
+             #:omit-txexpr (txexpr? . -> . any/c)
+             #:min-left-length (or/c (and/c integer? positive?) #f)
+             #:min-right-length (or/c (and/c integer? positive?) #f)) . ->* . xexpr/c))
+
+(define (make-hyphenate-function patterns exceptions)
+  (make-keyword-procedure
+   ;; put caches here so they can persist across successive invocations of the function.
+   ;; but remain distinct between instantiations of this module (say, us vs fr)
+   ;; pass them as arguments to the core:hyphenate func
+   (let ([word-cache exceptions] ; preload exceptions
+         [pattern-cache patterns])
+     (λ (kws kw-args . rest)
+       (keyword-apply core:hyphenate kws kw-args word-cache pattern-cache rest)))))
+
+(define unhyphenate
+  (make-keyword-procedure
+   (λ (kws kw-args . rest)
+     (keyword-apply core:unhyphenate kws kw-args rest))))
+
+(define unhyphenate/c
+  ((xexpr/c) ((or/c char? string?) 
+              #:omit-word (string? . -> . any/c)
+              #:omit-string (string? . -> . any/c)
+              #:omit-txexpr (txexpr? . -> . any/c)) . ->* . xexpr/c))
+
 (define-syntax (build-main stx)
   (syntax-case stx () 
     [(_ dir)
-     (with-syntax ([patterns-path (format "~a/patterns.rkt" (syntax->datum #'dir))]
-                   [exceptions-path (format "~a/exceptions.rkt" (syntax->datum #'dir))])
-       (replace-context
-        stx
-        #'(begin
-            (require txexpr/base
-                     sugar/define
-                     (only-in xml xexpr/c)
-                     (prefix-in core: hyphenate/private/core)
-                     patterns-path exceptions-path)
-            
-            (module+ safe
-              ;; An exception-word is a string of word characters or hyphens.
-              (define (exception-word? x)
-                (and (string? x) (regexp-match #px"^(\\p{L}|-)+$" x) #t))
-              (define (exception-words? xs) 
-                (and (list? xs) (andmap exception-word? xs))))
-            
-            (define+provide+safe hyphenate
-              ((xexpr?) ((or/c char? string?) 
-                         #:exceptions exception-words? 
-                         #:min-length (or/c integer? #f)
-                         #:omit-word (string? . -> . any/c)
-                         #:omit-string (string? . -> . any/c)
-                         #:omit-txexpr (txexpr? . -> . any/c)
-                         #:min-left-length (or/c (and/c integer? positive?) #f)
-                         #:min-right-length (or/c (and/c integer? positive?) #f)) . ->* . xexpr/c)
-              (make-keyword-procedure
-               ;; put caches here so they can persist across successive invocations of the function.
-               ;; but remain distinct between instantiations of this module (say, us vs fr)
-               ;; pass them as arguments to the core:hyphenate func
-               (let ([word-cache exceptions] ; preload exceptions
-                     [pattern-cache patterns])
-                 (λ (kws kw-args . rest)
-                   (keyword-apply core:hyphenate kws kw-args (list* word-cache pattern-cache rest))))))
-            
-            (define+provide+safe unhyphenate
-              ((xexpr/c) ((or/c char? string?) 
-                          #:omit-word (string? . -> . any/c)
-                          #:omit-string (string? . -> . any/c)
-                          #:omit-txexpr (txexpr? . -> . any/c)) . ->* . xexpr/c)
-              (make-keyword-procedure (λ (kws kw-args . rest)
-                                        (keyword-apply core:unhyphenate kws kw-args rest)))))))]))
\ No newline at end of file
+     (with-syntax ([PATTERNS-PATH (path->string (build-path (symbol->string(syntax->datum #'dir)) "patterns.rkt"))]
+                   [EXCEPTIONS-PATH (path->string (build-path (symbol->string (syntax->datum #'dir)) "exceptions.rkt"))]
+                   [PATTERNS-ID 'patterns]
+                   [EXCEPTIONS-ID 'exceptions])
+       #'(begin
+           (require PATTERNS-PATH EXCEPTIONS-PATH)
+           (define+provide+safe hyphenate
+             hyphenate/c
+             (make-hyphenate-function PATTERNS-ID EXCEPTIONS-ID))
+           (provide+safe [unhyphenate unhyphenate/c])))]))
\ No newline at end of file