The following keywords are for examining, for keeping and for removing symbols, functions, and entire packages from the image.
:delete-packages :exports :functions-to-remove :keep-documentation :keep-function-name :keep-load-function :keep-package-manipulation :keep-symbols :macro-packages-to-keep :never-shake-packages :no-symbol-function-usage :packages-to-keep :packages-to-keep-symbol-names :redefine-compiler-p :remove-setf-function-name :shake-externals :smash-packages :smash-packages-symbols :symbol-names-action