Isn't this up to the implementation? I mostly use ACL, which has its own DEFSYSTEM, so I must (REQUIRE 'ASDF) to get the bundled ASDF.
OTOH, I think SBCL, at least, may use ASDF to manage its own build, in which case I'm not sure how to make it unavailable (although I imagine that could be managed).
Isn't this up to the implementation? I mostly use ACL, which has its own DEFSYSTEM, so I must (REQUIRE 'ASDF) to get the bundled ASDF.
OTOH, I think SBCL, at least, may use ASDF to manage its own build, in which case I'm not sure how to make it unavailable (although I imagine that could be managed).