diff --git a/scheme/install-lib/install-lib-module.scm b/scheme/install-lib/install-lib-module.scm
index 4a77935..ce9af48 100644
--- a/scheme/install-lib/install-lib-module.scm
+++ b/scheme/install-lib/install-lib-module.scm
@@ -1,8 +1,29 @@
 ;;; Installation library for scsh modules.
-;;; $Id: install-lib-module.scm,v 1.10 2004/05/16 14:33:49 michel-schinz Exp $
+;;; $Id: install-lib-module.scm,v 1.11 2004/05/17 20:14:13 michel-schinz Exp $
 
 ;;; Interfaces
 
+;; List utilities (extensions to SRFI-1)
+(define-interface list-utils-interface
+  (export common-prefix-length
+          alist-replace
+          alist-combine
+          alist-get))
+
+;; String utilities (extensions to SRFI-13)
+(define-interface string-utils-interface
+  (export as-string
+          spaces))
+
+;; File utilities (extensions to scsh)
+(define-interface file-utils-interface
+  (export parent-directory
+          create-directory&parents
+          relative-file-name
+          re-root-file-name
+          paths->file-name))
+
+;; Installation library
 (define-interface install-interface
   (export tmpl-libtool-la-reader
 
@@ -34,12 +55,21 @@
           (with-output-to-load-script :syntax)
           write-to-load-script
 
+          display-error-and-exit
+
           install-main
           install-program-main))
 
+(define-interface install-full-interface
+  (compound-interface install-interface
+                      list-utils-interface
+                      string-utils-interface
+                      file-utils-interface))
+
 ;;; Structures
 
-(define-structure install install-interface
+(define-structures ((install-lib install-full-interface)
+                    (install install-full-interface)) ;deprecated name
   (open scheme-with-scsh
         cells
         fluids