Thanks for the report. abscissa_derive is a dependency of abscissa_core but I have been waiting with the upload of that since tracing-subscriber have some features disabled and it's non-trivial to reenable them (due to the regex situation iirc).
abscissa_core is a dependency of cargo-audit, and that is a very nice security tool to enable in your ci/cd, so I would like to get that into Debian so that it can be used more. But cargo-audit also needs gix, and I'm currently spending my time trying to package that stack. I'll circle back to this once gix is in Debian and hopefully upstream will have updated by then. //Alex