So after taking a look. We are NOT going to have a unstable release today so we can fall 1 day behind on master. Why you might be thinking. Well in nixos/nixpkgs the staging branch is roughly 1 day behind master and then nixos-unstable and nixpkgs-unstable are roughly 1 day behind staging (2 days behind master).
In theory this means that we can piggyback upon upstream’s binary cache for that bit longer.