Put your game directory into ~/quicklisp/local-projects. Just in case, give the same name to the game directory, .asd file and your system, e.g. if your system name (as specified via asdf:defsystem) is efeijo-game then ~/quicklisp/local-projects/efeijo-game/efeijo-game.asd
Thanks for the helpful advice. For some strange reason, today I restarted emacs and the game system loaded on first try! I didn't figure out what was the error source, but I remember sbcl was trying to compile "packages.lisp" from /tmp/packages.lisp, which doesn't exist.
