diff -ur mcvs-1.0.13.orig/code/unix-bindings/unix.lisp mcvs-1.0.13/code/unix-bindings/unix.lisp
--- mcvs-1.0.13.orig/code/unix-bindings/unix.lisp	2004-06-08 02:28:51.393937000 -0500
+++ mcvs-1.0.13/code/unix-bindings/unix.lisp	2004-06-08 02:40:31.521501480 -0500
@@ -38,7 +38,7 @@
 (defmacro def-c-call-out (sym &body args)
   `(def-call-out ,sym (:language :stdc) ,@args))
 
-#.(when (> (read-from-string (lisp-implementation-version)) 2.30)
+#.(progn
     (push :clisp-newer-than-2.30 *features*)
     (values))