The Nix Hour is a weekly beginner-oriented improvised QA-style lecture on Nix, hosted by Tweag. Here you can bring your questions and we'll answer them with more context, examples, alternatives, tradeoffs and related topics. These meetings are open for anybody to join, but also recorded and uploaded to the Tweag YouTube channel. For more information check out https://discourse.nixos.org/t/the-nix-hour-a-weekly-nix-qa-lecture-by-tweag/22767
Curated by: Tweag by Modus Create (81 videos)
The Nix Hour is an open beginner-oriented Q&A-style lecture on Nix, where you can bring your questions and we’ll answer them with more context, examples, alternatives, tradeoffs and related topics. PR created during this session: https://github.com/nixos/nixpkgs/pull/235040 Jitsi Meeting to ask questions directly: https://meet.jit.si/nix-hour Matrix room for questions, feedback and notifications: https://matrix.to/#/%23nix-hour:matrix.org Issue tracker for asynchronous questions: https://github.com/tweag/nix-hour/issues Previous sessions playlist: https://www.youtube.com/playlist?list=PLyzwHTVJlRc8yjlx4VR4LU5A5O44og9in For more information and updates, check out https://discourse.nixos.org/t/the-nix-hour-a-weekly-nix-qa-lecture-by-tweag/22767 00:00 Intro, why was nodejs v16 deprecated ahead of EOL 01:26 NixOS release schedule 03:03 How meta.knownVulnerabilities is handled in nixpkgs 05:13 config.nix impurity in nixpkgs with and without flakes 09:29 Last days of ZHF 23.05 09:57 Hydra projects and jobsets 11:49 What happens with failures after ZHF ends 12:48 Looking at random broken package (clickhouse) 15:28 Simpler package (cameradar) 16:56 Using `nix edit` to find package source 17:56 How packages are marked as broken after ZHF 18:37 Details about ZHF 19:29 https://malob.github.io/nix-review-tools-reports 22:15 https://zh.fail 23:17 A script to build all packages that you maintain 24:19 Confirming breakage on master 25:17 Checking if someone else posted a PR with a fix 26:56 Discovering changes that affect package on Hydra 28:14 We'll not cover git bisect here 28:32 Getting into build directory 30:42 Looking at the broken dependency 31:29 Looking at the source of the package itself 35:14 Dowgrading dependency if older one exists in nixpkgs 36:40 Getting old version of dependency outside nixpkgs 38:52 Finding nixpkgs commit containing old version of curl on Hydra 40:12 Fetching old version of nixpkgs, using package from it 42:19 Checking how long does it take to build a package on Hydra 42:41 Testing the package, looking at what it supposed to do 43:56 Marking the package as broken with comment 45:19 Creating a PR to nixpkgs 51:42 Q: Why doesn't fetching old nixpkgs work for upstream? 53:16 Q: Can we make old curl available in nixpkgs? 56:55 Out of time