Changes between Nix and Determinate Nix

This section lists the differences between upstream Nix 2.28 and Determinate Nix 3.5.2.

In Determinate Nix, flakes are stable. You no longer need to enable the flakes experimental feature.
In Determinate Nix, the new Nix CLI (i.e. the nix command) is stable. You no longer need to enable the nix-command experimental feature.
Determinate Nix has a setting json-log-path to send a copy of all Nix log messages (in JSON format) to a file or Unix domain socket.
Determinate Nix has made nix profile install an alias to nix profile add, a more symmetrical antonym of nix profile remove.
nix-channel and channel: url syntax (like channel:nixos-24.11) is deprecated, see: https://github.com/DeterminateSystems/nix-src/issues/34
Using indirect flake references and implicit inputs is deprecated, see: https://github.com/DeterminateSystems/nix-src/issues/37
Warnings around "dirty trees" are updated to reduce "dirty" jargon, and now refers to "uncommitted changes".

nix upgrade-nix is now inert, and suggests using determinate-nixd upgrade -- DeterminateSystems/nix-src#55
Initial Lazy Trees support has been merged, but remains off by default. (DeterminateSystems/nix-src#27, DeterminateSystems/nix-src#56)

Fix emitting narHash in lock files when lazy trees are disabled by @edolstra in DeterminateSystems/nix-src#63
Improve 'cannot read file from tarball' error by @edolstra in DeterminateSystems/nix-src#64