No QL?

Correct, it's not currently available on Quicklisp. I made a Git version of this package in the past, and I may try to publish it on Quicklisp.

(I should note that I'm not the author of AP5.)

I'm not sure what you mean - could you please elaborate on the question?

I believe he’s asking if it’s available via QuickLisp. It’s a sort of package manager for Common Lisp, but it seems to no longer be maintained.

Ah, thanks for the clarification. Quicklisp is very much maintained and is the de-facto standard method for installing Common Lisp packages :) Although there are alternatives, too - https://github.com/CodyReichert/awesome-cl#library-manager