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# Release 2.10 (2022-07-11)
* `nix repl` now takes installables on the command line, unifying the usage
with other commands that use `--file` and `--expr`. Primary breaking change
is for the common usage of `nix repl '<nixpkgs>'` which can be recovered with
`nix repl --file '<nixpkgs>'` or `nix repl --expr 'import <nixpkgs>{}'`.
This is currently guarded by the `repl-flake` experimental feature.
* A new function `builtins.traceVerbose` is available. It is similar
to `builtins.trace` if the `trace-verbose` setting is set to true,
and it is a no-op otherwise.
* `nix search` has a new flag `--exclude` to filter out packages.
* On Linux, if `/nix` doesn't exist and cannot be created and you're
not running as root, Nix will automatically use
`~/.local/share/nix/root` as a chroot store. This enables non-root
users to download the statically linked Nix binary and have it work
out of the box, e.g.
```
# ~/nix run nixpkgs#hello
warning: '/nix' does not exists, so Nix will use '/home/ubuntu/.local/share/nix/root' as a chroot store
Hello, world!
```
* `flake-registry.json` is now fetched from `channels.nixos.org`.
* Nix can now be built with LTO by passing `--enable-lto` to `configure`.
LTO is currently only supported when building with GCC.
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