diff --git a/module/mes/guile.scm b/module/mes/guile.scm
index 451843b4..26fc2cc7 100644
--- a/module/mes/guile.scm
+++ b/module/mes/guile.scm
@@ -47,6 +47,7 @@
             core:type
             %compiler
             equal2?
+            keyword->string
             pmatch-car
             pmatch-cdr
             )
@@ -85,6 +86,7 @@
   (define <cell:vector> 15)
 
   (define %compiler "gnuc")
+  (define keyword->string (compose symbol->string keyword->symbol))
 
   (define (core:type x)
     (cond ((guile:keyword? x) <cell:keyword>)
diff --git a/scaffold/boot/43-or.scm b/scaffold/boot/43-or.scm
index bd8cb1d2..1ad758ec 100644
--- a/scaffold/boot/43-or.scm
+++ b/scaffold/boot/43-or.scm
@@ -28,7 +28,7 @@
   (or #t a))
 
 (define-macro (foo bar)
-  (list f bar))
+  (list 'f bar))
 
 (foo 3)
 
diff --git a/scaffold/boot/45-pass-if.scm b/scaffold/boot/45-pass-if.scm
index 1d8a30f5..31ccc7f2 100644
--- a/scaffold/boot/45-pass-if.scm
+++ b/scaffold/boot/45-pass-if.scm
@@ -26,6 +26,6 @@
   (list
    'begin
    (list core:display "test: ") (list core:display name)
-   (list result t)))
+   (list (quote result) t)))
 
 (pass-if "first dummy" #t)
diff --git a/scaffold/boot/46-report.scm b/scaffold/boot/46-report.scm
index fa62ca07..2d262164 100644
--- a/scaffold/boot/46-report.scm
+++ b/scaffold/boot/46-report.scm
@@ -54,7 +54,7 @@
   (list
    'begin
    (list display "test: ") (list display name)
-   (list result t)))
+   (list (quote result) t)))
 
 (pass-if "first dummy" #t)
 
diff --git a/scaffold/boot/47-pass-if-eq.scm b/scaffold/boot/47-pass-if-eq.scm
index 5c5807dc..c9e53dd6 100644
--- a/scaffold/boot/47-pass-if-eq.scm
+++ b/scaffold/boot/47-pass-if-eq.scm
@@ -26,7 +26,7 @@
   (list
    'begin
    (list core:display "test: ") (list core:display name)
-   (list result t)))
+   (list (quote result) t)))
 
 (define-macro (pass-if-eq name expect . body)
   (list 'pass-if name (list eq? expect (cons 'begin body))))
diff --git a/scaffold/boot/48-let.scm b/scaffold/boot/48-let.scm
index fecb2a39..54b01ee1 100644
--- a/scaffold/boot/48-let.scm
+++ b/scaffold/boot/48-let.scm
@@ -16,15 +16,15 @@
 ;;; You should have received a copy of the GNU General Public License
 ;;; along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
 
-(define (map1 f lst)
+(define (map f lst)
   (if (null? lst) (list)
-      (cons (f (car lst)) (map1 f (cdr lst)))))
+      (cons (f (car lst)) (map f (cdr lst)))))
 
 (define (cadr x) (car (cdr x)))
 
 (define-macro (let bindings . rest)
-  (cons (cons 'lambda (cons (map1 car bindings) rest))
-        (map1 cadr bindings)))
+  (cons (cons 'lambda (cons (map car bindings) rest))
+        (map cadr bindings)))
 
 (let ((x 0)) x)
 (let ((y 0)) y)
diff --git a/scaffold/boot/51-module.scm b/scaffold/boot/51-module.scm
index 83040145..7d3e30ae 100644
--- a/scaffold/boot/51-module.scm
+++ b/scaffold/boot/51-module.scm
@@ -17,8 +17,7 @@
 ;;; along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
 
 (cond-expand
- (guile
-  (set! %load-path (append %load-path '("mes/module"))))
+ (guile)
  (mes
   (define (cons* . rest)
     (if (null? (cdr rest)) (car rest)
diff --git a/scaffold/boot/60-let-syntax-expanded.scm b/scaffold/boot/60-let-syntax-expanded.scm
index 52049287..cfb229fb 100644
--- a/scaffold/boot/60-let-syntax-expanded.scm
+++ b/scaffold/boot/60-let-syntax-expanded.scm
@@ -248,6 +248,15 @@
   (or (null? x)
       (and (pair? x) (list? (cdr x)))))
 
+(cond-expand
+ (guile)
+ (mes
+  (define (boolean? x)
+    (or (eq? x #f) (eq? x #t)))
+  (define (char? x)
+    (and (eq? (core:type x) <cell:char>)
+         (> (char->integer x) -1)))))
+
 ;; -*-scheme-*-
 
 ;;; GNU Mes --- Maxwell Equations of Software