With `nix flake update`, how can I see which pacakges are updated?

For example this flake has several outputs (devShell and two packages) with different inputs and packages. When I run nix flake update it shows me changes to flake inputs, but how can I see the changes to individual packages (dependencies)? For my system flake I’m using nix store diff-closures and it gives a really useful report (like this). But can I also do this for a dev shell? Where would I find profiles to compare? Or is there another way?