OK, that's exactly the kind of feedback I needed — thanks.
I am convinced by the general feedback: defining this macro in the keyword package is a great idea, but just not as part of asdf.
Thanks to stassats and Xach in particular for mentioning that they were already using that trick.
In asdf master, I've renamed it back to a normal symbol. I'll add a wrapper in the keyword package in my .sbclrc or some such.
—♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics• http://fare.tunes.org Common Lisp makes it easy for you to grow your own language; however, it makes it difficult for that language to be the same as anyone else's.