You probably want to :depend-on (:fare-quasiquote-extras), which enables the named-readtable :fare-quasiquote and hooks for pattern-matching with Optima.
Then in your file, you would
(defpackage ... (:use :optima) ...)
... (match (`(foo ,@bar) ...) ...)
Note that ,@ probably only works well with pattern-matching when in final position, and that the pedantically correct syntax is `(foo . ,bar) whereas the former in a strict reading of the standard is required to (append ... nil) which optima won't recognize.
fare-quasiquote is written by Fare Rideau.
git clone git://common-lisp.net/users/frideau/fare-quasiquote.git