# Release X.Y (202?-??-??) * The `repeat` and `enforce-determinism` options have been removed since they had been broken under many circumstances for a long time. * You can now use [flake references] in the [old command line interface], e.g. [flake references]: ../command-ref/new-cli/nix3-flake.md#flake-references [old command line interface]: ../command-ref/main-commands.md ``` # nix-build flake:nixpkgs -A hello # nix-build -I nixpkgs=flake:github:NixOS/nixpkgs/nixos-22.05 \ '' -A hello # NIX_PATH=nixpkgs=flake:nixpkgs nix-build '' -A hello ``` * Instead of "antiquotation", the more common term [string interpolation](../language/string-interpolation.md) is now used consistently. Historical release notes were not changed. * Error traces have been reworked to provide detailed explanations and more accurate error locations. A short excerpt of the trace is now shown by default when an error occurs.