I just went through the remaining items on the transition tracker for this transition filing bug reports where appropriate.
freewheeling: sid-only, unrelated FTBFS bug https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=946863 haskell-hopenpgp/haskell-hopenpgp-tools: haskell-incremental-parser has picked up a build-depends on a package that has never built on 6/10 release architectures https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=965299 ocamlnet: FTBFS on most architectures, doesn't look related to nettle transition https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=965300 opendht: FTBFS, doesn't look related to nettle transition. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=965301 caml-crush (sid-only): no binnmu scheduled (builds successfully on reproducible builds) ring (sid-only): unrelated FTBFS https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=961837 dpaste (sid-only) FTBFS on reproducible builds, depends on rc buggy package.