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# 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 \
'<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.
* In derivations that use structured attributes, you can now use `unsafeDiscardReferences`
to disable scanning a given output for runtime dependencies:
```nix
__structuredAttrs = true;
outputChecks.out.unsafeDiscardReferences = true;
```
This is useful e.g. when generating self-contained filesystem images with
their own embedded Nix store: hashes found inside such an image refer
to the embedded store and not to the host's Nix store.
This requires the `discard-references` experimental feature.
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