After some mucking around, I've come up with the following solution: In my source files, after I declare my package, compile/load the appropriate modules but before I declare anything in my package, I added the following code: (defmethod sb-bsd-sockets:socket-make-stream ((socket sb-bsd-sockets:socket) &key input output (element-type 'character) (buffering :full) (external-format :default) timeout
![AllegroServe on SBCL 1.0.28 failing with `accept invalid keyword argument: :AUTO-CLOSE`](https://cdn-ak-scissors.b.st-hatena.com/image/square/98d6f053a97a87156775f60757c60865d0f2c47d/height=288;version=1;width=512/https%3A%2F%2Fcdn.sstatic.net%2FSites%2Fstackoverflow%2FImg%2Fapple-touch-icon%402.png%3Fv%3D73d79a89bded)