doc/manual/source/release-notes/rl-2.10.md
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.