diff --git a/gnu/packages/lisp.scm b/gnu/packages/lisp.scm
index b49f5dd..e7bdcb2 100644
--- a/gnu/packages/lisp.scm
+++ b/gnu/packages/lisp.scm
@@ -458,13 +458,13 @@ interface.")
             'install
             (lambda* (#:key outputs inputs #:allow-other-keys)
               (let* ((out (assoc-ref outputs "out"))
-                     (bin (string-append out "/bin")))
+                     (bin (string-append out "/bin"))
+                     (doc (string-append (assoc-ref outputs "doc")
+                                         "/share/doc/lispf4")))
                 (install-file "lispf4" bin)
                 (install-file "SYSATOMS" bin)
                 (install-file "BASIC.IMG" bin)
-                (let* ((doc (assoc-ref outputs "doc"))
-                       (doc (string-append doc "/share/doc/lispf4")))
-                  (copy-recursively "Documentation" doc)))
+                (copy-recursively "Documentation" doc))
                 #t)))))
       (synopsis "InterLisp interpreter")
       (description