diff --git a/src/ikarus.boot b/src/ikarus.boot
index dd5fd27..9a002a2 100644
Binary files a/src/ikarus.boot and b/src/ikarus.boot differ
diff --git a/src/ikarus.library-manager.ss b/src/ikarus.library-manager.ss
index d58e3c1..7bbe6b9 100644
--- a/src/ikarus.library-manager.ss
+++ b/src/ikarus.library-manager.ss
@@ -2,7 +2,7 @@
 
 
 (library (ikarus library-manager)
-  (export imported-label->binding library-subst/env
+  (export imported-label->binding library-subst
           current-library-collection installed-libraries
           find-library-by-name install-library
           library-spec invoke-library)
@@ -41,9 +41,12 @@
         [(pred (car ls)) (car ls)]
         [else (f (cdr ls))])))
 
+  (define (install-library-by-name name)
+    #f)
+
   (define (find-library-by-name name)
     (find-library-by
-      (lambda (x) (equal? (library-name x) name))))
+       (lambda (x) (equal? (library-name x) name))))
 
   (define (library-exists? name)
     (and (find-library-by
@@ -102,11 +105,6 @@
 
   (define installed-libraries 
     (lambda () ((current-library-collection))))
-  (define library-subst/env
-    (lambda (x) 
-      (unless (library? x)
-        (error 'library-subst/env "~s is not a library" x))
-      (values (library-subst x) (library-env x))))
   (define library-spec       
     (lambda (x) 
       (unless (library? x)
diff --git a/src/ikarus.syntax.ss b/src/ikarus.syntax.ss
index 9bd3c76..b0b0323 100644
--- a/src/ikarus.syntax.ss
+++ b/src/ikarus.syntax.ss
@@ -595,9 +595,9 @@
              (stx-error x))])))
   (define scheme-stx
     (lambda (sym)
-      (let-values ([(subst env) 
-                    (library-subst/env 
-                      (find-library-by-name '(ikarus system $all)))])
+      (let ([subst 
+             (library-subst 
+               (find-library-by-name '(ikarus system $all)))])
         (cond
           [(assq sym subst) =>
            (lambda (x)
@@ -2096,7 +2096,7 @@
          (let ([lib (find-library-by-name spec)])
            (unless lib
              (error 'import "cannot find library satisfying ~s" spec))
-           (let-values ([(s _r) (library-subst/env lib)])
+           (let ([s (library-subst lib)])
               (values s lib)))]))
     (cond
       [(null? imp*) (values '() '())]