Looks like it's been recently updated as of about an hour ago

Might be worth migrating your php apps to containerized builds to help avoid this issue

You can probably mount the same data into the container, depending on the apps configuration

Doesn’t help if you build a nix flake based app yourself though, but with that you can manually pin a build.

The update reached the nixos-26.05-small and nixos-unstable-small channels. Many programs depend on PHP, so the main channels need time rebuilding and fixing potential build failures.