program-op compression

Hi list, I want to use asdf's program-op to dump an image, using this command: sbcl --eval '(asdf:operate :build-op :my-system)' This works perfectly. An image is correctly dumped, and works fine. However, the image is 70MB. Is it possible to use sb-ext:save-lisp-and-die's :compression option? In the source, I've seen :extra-build-args, but it seems to be a make-build option only. I'm not very familiar with asdf's source though, so I'm surely missing something. Cheers, -- Florian Margaine