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PODCAST

Chaos Computer Club - recent events feed

Der Chaos Computer Club ist die größte europäische Hackervereinigung, und seit über 25 Jahren Vermittler im Spannungsfeld technischer und sozialer Entwicklungen.

technology

All Episodes

00:25:30

Kubernetes on Nix (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/06

Running a production grade kubernetes cluster is a non trivial task. Although many commercial and non-commercial solutions are available, each comes with its own limitations. Some are primarily meant to set up a single node development cluster, others have hardly any flexibility. Here NixOS comes to the rescue, allowing us to build our cluster the way we want. However, because of the complexity of such a multi host setup, this is a bit more work than a services.kubernetes.enable = true;. We will

00:05:36

NixCI Demo (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/06

In this demo I will demo https://nix-ci.com/ to showcase how Nix can give us zero-config locally reproducible CI. about this event: https://talks.nixcon.org/nixcon-2025/talk/FHMLKZ/

00:05:12

Share your daemons with your peers (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/06

The ssh-ng store implementation allows connecting to remote daemons over ssh. However, between server management, key exchanges, and device discovery, SSH is not the most user friendly. Unfortunately ssh-ng is also the only store implementation for active remotes built into nix. Let's ignore that fact and forward a remote daemon via P2P instead. Why would you do this? Does this work? And what can we learn from it? This talk might answer any or all of that. about this event:

00:20:37

Embarrassingly parallel evaluations (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/06

Nix offers an unparalleled collection of readily packaged C/C++ libraries, with the added benefits of cross-compilation support and a declarative configuration language. That's why we chose it to manage third-party dependencies for our Bazel-built monorepo. This not-too-common use of Nix as a polyglot build system for external libraries and tools led us to approach Nix in a different way, both in how we think about it and how we used it. Our usage scenarios seemed rarely exercised an we found

00:25:06

garn: A Faster, Friendlier Nix in TypeScript...

Chaos Computer Club - recent events feed ·

2025/09/06

Nix is a powerful tool, but it also comes with some well-known problems: a steep learning curve, bad error messages, and slow evaluation. What if we could solve these three problems in one stroke? garn is an experiment in doing just that. With garn, you define derivations with TypeScript instead of in the Nix language. TypeScript is familiar to most developers, well-documented, and supported by rich editor tooling - thus lowering the learning barrier. And instead of stack traces, you mostly get

00:43:45

Steering Committee & Foundation Board Panel (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/06

Discussion & Q&A about this event: https://talks.nixcon.org/nixcon-2025/talk/RZPTFK/

00:20:11

DerivationBuilder, extracting Nix's sandboxing logic...

Chaos Computer Club - recent events feed ·

2025/09/06

The most subtle part of Nix's store layer is the exact logic used to sandbox derivations. Mess up the daemon protocol, Local Store SQLite usage, drv file parsing, or other such things, and things should blow up immediately. Fail Fast helps a lot! Mess up the sandboxing logic, however, and you might not notice for a while until you try to build just the right sort of derivation.For most of Nix's history, the sandboxing logic has been embedded within the build scheduling logic (which builds or

00:20:08

The bikes have been shed: The official Nix formatter...

Chaos Computer Club - recent events feed ·

2025/09/06

The history of how the official Nix formatter was successfully established, along with its struggles and lessons. We go over: - How Nix didn't have a formatter for its first 15 years before the first ones were written - How an RFC to standardise the formatter took 3 years, 50 meetings and 600 comments to get accepted - How one of the most active codebases with 40k Nix files and 15k monthly commits got fully reformatted - What problems still exist and what the future of Nix formatting holds about

00:04:06

Saturday Opening Ceremony (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/06

Opening day 2 about this event: https://talks.nixcon.org/nixcon-2025/talk/XVBSXD/

00:05:07

jail.nix - A library to easily jail your NixOS...

Chaos Computer Club - recent events feed ·

2025/09/05

Given the amount of software written in memory unsafe languages, and the rise in supply chain attacks, I prefer to run as much software as possible within some kind of security boundary (mostly using bubblewrap and qemu). Bubblewrap is the sandboxing tool at the core of Flatpak, but it is intentionally designed to be very low level. Using bubblewrap, one can write wrappers for every package on their system, but getting the flags right can be error prone, and often lead to annoying debug cycles to

00:03:17

Ricochets (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/05

I made a thing to manage the Linux machines of my friends and family: https://sraka.xyz/posts/ricochets.html, it's a hack with a custom NixOS default channel :) about this event: https://talks.nixcon.org/nixcon-2025/talk/RDSBZN/

00:05:08

How I wish Bazel had nix develop (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/05

Nix's package composition model makes developer environments a natural extension of its core abstractions. A simple shell.nix declaration combined with nix develop provides native tooling access and IDE integration that other build systems struggle to achieve without significant engineering investment. At LinkedIn, I experienced this contrast firsthand while migrating Go repositories to Bazel. I spent six months reverse-engineering Bazel's sandbox internals, writing custom rules to extract SDK

00:20:59

Life without Kubernetes: Hosting Mirrors with NixOS...

Chaos Computer Club - recent events feed ·

2025/09/05

Kubernetes is good for many machines with complex networking setups, but not that good for a 2-machine one, especially when there's only one maintainer and zero documentation. At GeekPie, I've migrated our mirror infrastructure to NixOS and in this talk I want to show how Nix helps us achieve more with less code & maintenance. about this event: https://talks.nixcon.org/nixcon-2025/talk/MKJPLZ/

00:19:18

My first Nix Aha!: A Newcomer’s Perspective (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/05

When I first saw a colleague of mine typing "nix-shell", I had no idea what it did — but running it felt like magic. A swirl of "/nix/store/..." messages later, a fully working dev environment, with all the right tools and no system mess! Like Alice, I was “curiouser and curiouser.”In this talk, I’ll share the key “aha!” moments from my first few weeks with Nix — how I came to understand derivations, the Nix store, and pure builds. I’ll walk through the “from confusion to clarity” moments that

00:45:19

Supply Chain Security Panel Discussion (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/05

Nix is a very promising technology for fundamentally improving supply chain security. In some ways its lives up to this promise already, in a lot of ways pieces of the overall puzzle are still missing, fall short in implementation, adoption or UX. Our panelists all work on supply chain security related tools and topics in the the Nix ecosystem, which we will use as a starting point to plainly discuss which issues they are trying to address and how they might fit into an overall picture. Come join

00:19:01

Nix-based development environments at Shopify...

Chaos Computer Club - recent events feed ·

2025/09/05

Over the past year at Shopify we've undergone a lot of changes internally. We moved from cloud development to local development, multirepo to monorepo, and Homebrew / Apt to Nix. Today, the majority of development is being done inside Nix-based environments. Some may recall that Shopify was using Nix back in 2019, so what happened? This talk will cover: * Why that effort stalled * How devenv reignited interest in Nix * How we approached incrementally migrating a huge collection of projects * Where

00:24:39

The Nix Binary Cache and AWS (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/05

Behind the Scenes of cache.nixos.org: Scaling Nix’s Binary Cache to Infinity The Nix binary cache is the silent powerhouse of the Nix ecosystem: every day, it fields thousands of requests per second—amounting to nearly 6 billion requests per month!—for NixOS and Nix users worldwide. But what makes it work at scale, how—or why—is its simplicity a virtue, and how does an ongoing partnership between AWS and the Nix Foundation ensure its availability for years to come? In this fireside chat, join Ron

00:26:34

Flatpaks the Nix way (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/05

Nix and Flatpak are often seen as solving similar problems from different angles: one declarative and reproducible, the other sandboxed and user-friendly. But what happens when you try to make them work together? And why would you want to do it? In this talk, I’ll present nix-flatpak (https://github.com/gmodena/nix-flatpak), an open-source project to declaratively manage Flatpak apps with Nix. This project started as a personal learning experiment to understand Nix, flakes, and module design, and

00:22:59

The Road  Towards a  NixOS UI (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/05

Imagine a Sim-City-style interface for managing your infrastructure: drag a machine onto the field, connect it to a service, and you're done. Behind the scenes, the clan.lol project turns that visual layout into the correct Nix modules - automatically configuring machines, managing secrets, and setting up a mesh VPN. In this presentation we detail: - Visualize and Configure Networks in 3D - A "Sim City" inspired 3D-UI to configure your selfhosted network without writing Nix! - Portable

00:43:47

Free Software (Talk and Discussion) (nixcon2025)

Chaos Computer Club - recent events feed ·

2025/09/05

This talk explores the challenges and opportunities faced by the free software movement today. It offers a broad reflection on what "freedom" means in modern computing — and why it's more relevant than ever. Touching on questions of trust, corporate co-option, licenses, and the ethics of technology, it emphasizes the role of community engagement and governance structures. With urgency and clarity, it calls on developers to think beyond code and to take responsibility for the digital world we are

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