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# Release 2.13 (2023-01-17)
* 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
```shell-session
# nix-build flake:nixpkgs -A hello
# nix-build -I nixpkgs=flake:github:NixOS/nixpkgs/nixos-22.05 \
'<nixpkgs>' -A hello
# NIX_PATH=nixpkgs=flake:nixpkgs nix-build '<nixpkgs>' -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.
* Allow explicitly selecting outputs in a store derivation installable, just like we can do with other sorts of installables.
For example,
```shell-session
# nix-build /nix/store/gzaflydcr6sb3567hap9q6srzx8ggdgg-glibc-2.33-78.drv^dev
```
now works just as
```shell-session
# nix-build glibc^dev
```
does already.
* On Linux, `nix develop` now sets the
[*personality*](https://man7.org/linux/man-pages/man2/personality.2.html)
for the development shell in the same way as the actual build of the
derivation. This makes shells for `i686-linux` derivations work
correctly on `x86_64-linux`.
* You can now disable the global flake registry by setting the `flake-registry`
configuration option to an empty string. The same can be achieved at runtime with
`--flake-registry ""`.
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