```common lisp
;;; -*- Mode: Lisp -*-

;;;  (c) copyright 2009 by 
;;;           Cyrus Harmon (ch-lisp@bobobeach.com)
;;;
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the 
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, 
;;; Boston, MA  02111-1307  USA.

(asdf:defsystem :mcclim-tiff-bitmaps
  :description "Support for TIFF images in McCLIM bitmap reading functions."
  :depends-on (:mcclim :retrospectiff)
  :components ((:file "tiff" :pathname #P"Extensions/Bitmap-formats/tiff")))
```

Define system in package ASDF-USER.
user
```common lisp
;;; -*- Mode: Lisp -*-

;;;  (c) copyright 2009 by 
;;;           Cyrus Harmon (ch-lisp@bobobeach.com)
;;;
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the 
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, 
;;; Boston, MA  02111-1307  USA.

(cl:in-package #:asdf-user)

(defsystem :mcclim-tiff-bitmaps
  :description "Support for TIFF images in McCLIM bitmap reading functions."
  :depends-on (:mcclim :retrospectiff)
  :components ((:file "tiff" :pathname #P"Extensions/Bitmap-formats/tiff")))
```
assistant