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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2019 Pierre Neidhardt <mail@ambrevar.xyz>
+;;; Copyright © 2020 Zhu Zihao <all_but_last@163.com>
+;;;
+;;; This file is not part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix 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 General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (nongnu packages emacs)
+  #:use-module (guix packages)
+  #:use-module (guix build-system emacs)
+  #:use-module (guix download)
+  #:use-module (nonguix licenses))
+
+(define-public clhs
+  (package
+    (name "clhs")
+    (version "0.6.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://beta.quicklisp.org/archive/clhs/2015-04-07/clhs-"
+                           version
+                           ".tgz"))
+       (sha256
+        (base32
+         "1cn5bfrcawrbc8s1wb07lpr6xv8758l1n5pgkyhamagmi1r0x128"))))
+    (build-system emacs-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'replace-loader
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (delete-file "clhs-use-local.el")
+             (let* ((out (assoc-ref outputs "out"))
+                    (hyperspec-dir (string-append "file://" out
+                                                  "/share/HyperSpec-7-0/")))
+               (with-output-to-file "clhs.el"
+                 (lambda ()
+                   (format #t ";;;###autoload~%~s~%~%~s"
+                           `(defun clhs-setup ()
+                              (setq common-lisp-hyperspec-root ,hyperspec-dir))
+                           `(provide 'clhs)))))))
+         (add-after 'install 'install-doc
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out"))
+                    (hyperspec-dir (string-append out "/share/HyperSpec-7-0/")))
+               (mkdir-p hyperspec-dir)
+               (copy-recursively "HyperSpec-7-0/HyperSpec" hyperspec-dir)))))))
+    (home-page "http://quickdocs.org/clhs/")
+    (synopsis "Offline Common Lisp HyperSpec")
+    (description
+     "This package bundles the full Common Lisp HyperSpec ready for offline
+browsing. An Emacs package is provided for easy access.  Load it with:
+
+@lisp
+(require 'clhs)
+(clhs-setup)
+@end lisp
+")
+    (license (nonfree "http://quickdocs.org/clhs/"))))