On 17 Nov 2021, at 12:26, Stelian Ionescu wrote:
To guarantee an old working configuration you can simply point to the version of the Quicklisp distribution that it was last tested with. We should make it easy to specify that as metadata, and it would be much more useful than version constraints because ASDF is not blocking compilation (after all, even old software might very well work with newer version of the dependencies).
This would be to assume that ASDF is only used in conjunction with Quicklisp, which is not the case.
You don't have to use the Quicklisp client to load dependencies, just to fetch them (as a package manager). And for that, I think it should be always used this way.