Nix 2.16 released

edolstra · May 31, 2023, 5:44pm

Hi,

I’m pleased to announce the availability of Nix 2.16.0. It is available from https://nixos.org/download.html and http://releases.nixos.org/?prefix=nix/nix-2.16.0/.

The most important changes are listed in the release notes.

drupol · May 31, 2023, 8:59pm

Copy pasting the changelog here for posterity!

Speed-up of downloads from binary caches. The number of parallel downloads (also known as substitutions) has been separated from the --max-jobs setting. The new setting is called max-substitution-jobs . The number of parallel downloads is now set to 16 by default (previously, the default was 1 due to the coupling to build jobs).

The function builtins.replaceStrings is now lazy in the value of its second argument to . That is, to is only evaluated when its corresponding pattern in from is matched in the string s .

I can’t wait to test this release, especially the perf improvements! Congrats to all contributors.

iFreilicht · June 1, 2023, 5:33pm

This might be the wrong place to ask, but is there a reason why nix is still version 2.13.3 in unstable and nixVersions.nix_2_16 doesn’t exist yet either?
I assumed I could try this out with nix nix-upgrade or nix-channel --update && nix profile install unstable#nix, but it seems I’d have to uninstall and reinstall nix instead.

NobbZ · June 1, 2023, 5:44pm

2.16 has been released only yesterday. It usually needs a week before it hits nixpkgs-unstable due to the processes involved.

edit

Okay, got merged already.

github.com/NixOS/nixpkgs

nixVersions.nix_2_16: init at 2.16.0

NixOS:master ← lovesegfault:nix-2.16.0

opened 03:52PM - 31 May 23 UTC

lovesegfault

+20 -15

###### Description of changes - nixVersions: use hash instead of sha256 - nixVe…rsions.nix_2_16: init at 2.16.0 - nixVersions.unstable: 2.15 -> 2.16 ###### Things done - Built on platform(s) - [ ] x86_64-linux - [ ] aarch64-linux - [ ] x86_64-darwin - [ ] aarch64-darwin - [ ] For non-Linux: Is `sandbox = true` set in `nix.conf`? (See [Nix manual](https://nixos.org/manual/nix/stable/command-ref/conf-file.html)) - [ ] Tested, as applicable: - [NixOS test(s)](https://nixos.org/manual/nixos/unstable/index.html#sec-nixos-tests) (look inside [nixos/tests](https://github.com/NixOS/nixpkgs/blob/master/nixos/tests)) - and/or [package tests](https://nixos.org/manual/nixpkgs/unstable/#sec-package-tests) - or, for functions and "core" functionality, tests in [lib/tests](https://github.com/NixOS/nixpkgs/blob/master/lib/tests) or [pkgs/test](https://github.com/NixOS/nixpkgs/blob/master/pkgs/test) - made sure NixOS tests are [linked](https://nixos.org/manual/nixpkgs/unstable/#ssec-nixos-tests-linking) to the relevant packages - [ ] Tested compilation of all packages that depend on this change using `nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD"`. Note: all changes have to be committed, also see [nixpkgs-review usage](https://github.com/Mic92/nixpkgs-review#usage) - [ ] Tested basic functionality of all binary files (usually in `./result/bin/`) - [23.05 Release Notes (or backporting 22.11 Release notes)](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md#generating-2305-release-notes) - [ ] (Package updates) Added a release notes entry if the change is major or breaking - [ ] (Module updates) Added a release notes entry if the change is significant - [ ] (Module addition) Added a release notes entry if adding a new NixOS module - [ ] Fits [CONTRIBUTING.md](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md).

https://nixpk.gs/pr-tracker.html?pr=235221

Infinisil · June 1, 2023, 6:38pm

There were some major breakages with 2.14 which blocked Nix updates in Nixpkgs for a while. 2.15 should work though, and in nix: 2.13.3 -> 2.15.1 by infinisil · Pull Request #233439 · NixOS/nixpkgs · GitHub it’s being made the default. 2.16 should still be further tested before it can be made the default though.

iFreilicht · June 2, 2023, 9:19am

Thanks to both of you! I should’ve looked in the nixpkgs PRs in the first place.

drupol · June 6, 2023, 3:33pm

Before you ask, 2.16.1 has been released, here’s the diff: Comparing 2.16.0...2.16.1 · NixOS/nix · GitHub