Release X.Y (2022-03-07)

Nix will now make some helpful suggestions when you mistype something on the command line. For instance, if you type nix build nixpkgs#thunderbrd, it will suggest thunderbird.
A number of "default" flake output attributes have been renamed. These are:
- defaultPackage.<system> → packages.<system>.default
- defaultApps.<system> → apps.<system>.default
- defaultTemplate → templates.default
- defaultBundler.<system> → bundlers.<system>.default
- overlay → overlays.default
- devShell.<system> → devShells.<system>.default
The old flake output attributes still work, but nix flake check will warn about them.
Breaking API change: nix bundle now supports bundlers of the form bundler.<system>.<name>= derivation: another-derivation;. This supports additional functionality to inspect evaluation information during bundling. A new repository has various bundlers implemented.
nix store ping now reports the version of the remote Nix daemon.
nix flake {init,new} now display information about which files have been created.
Templates can now define a welcomeText attribute, which is printed out by nix flake {init,new} --template <template>.