I guess I will proceed with bisect but...

$ git bisect visualize --no-merges --oneline
d4fd918e2cc2 libarchive: fix cygwin build
f4cd05d2e7c9 haskellPackages: mark builds failing on hydra as broken
4922225f956f haskellPackages.rhine-bayes: downgrade to match rhine
51c78494b9ff openldap: use --replace-fail instead of --replace
b770f35b4de1 openldap: fix build with structuredAttrs
79429223426a moltenvk: 1.4.0 -> 1.4.1
70f40e0a3b82 python313Packages.aiodns: 3.5.0 -> 3.6.1
50776d0e56eb apple-sdk: drop `FamilyDisplayName`
176c6512ba96 darwin.libcxx: 19.1.2+apple-sdk-15.5 -> 20.1.0+apple-sdk-26.0

Randy Eckenrode fyi