Should we base our search path on the XDG Base Directory Specification? http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html To the point of actually using getenv to get these search paths? I say we should. The default configuration files should be $XDG_CONFIG_DIRS/common-lisp/source-registry.conf $XDG_CONFIG_DIRS/common-lisp/source-registry.conf.d/ And the default search path should include $XDG_DATA_DIRS/common-lisp/systems/ $XDG_DATA_DIRS/common-lisp/source// The default cache path should be under $XDG_CACHE_HOME/common-lisp/ Unless anyone objects, I'll implement that behavior and commit something like ASDF 1.695. [ François-René ÐVB Rideau | Reflection&Cybernethics | http://fare.tunes.org ] Vision is the art of seeing what is invisible to others. — Jonathan Swift