# Release 2.6 (2022-01-24)

- The Nix CLI now searches for a `flake.nix` up until the root of the current Git repository or a filesystem boundary rather than just in the current directory.
- The TOML parser used by `builtins.fromTOML` has been replaced by a more compliant one.
- Added `:st`/`:show-trace` commands to `nix repl`, which are used to set or toggle display of error traces.
- New builtin function `builtins.zipAttrsWith` with the same functionality as `lib.zipAttrsWith` from Nixpkgs, but much more efficient.
- New command `nix store copy-log` to copy build logs from one store to another.
- The `commit-lockfile-summary` option can be set to a non-empty string to override the commit summary used when commiting an updated lockfile. This may be used in conjunction with the `nixConfig` attribute in `flake.nix` to better conform to repository conventions.
- `docker run -ti nixos/nix:master` will place you in the Docker container with the latest version of Nix from the `master` branch.