+ #.(or (car '(#+sbcl #:sb-gray
+ #+cmu #:extensions
+ #+ecl #.(if (find-package '#:gray) '#:gray '#:si)
+ #+clisp #:gray))
+ (error "Unsupported Lisp (can't find Gray streams)")))
+
+ ;; CMUCL's `extensions' package has lots of cruft. Use our cruft instead.
+ #+cmu (:shadowing-import-from #:sod-utilities #:symbolicate #:once-only))