NixCon 2025

Version 4.12 Sept. 5, 2025

We released a new schedule version!

We have a new session: “NixCI Demo” by syd.

Version 4.11 Sept. 5, 2025

We released a new schedule version!

We have a new session: “Saturday Opening Ceremony”.

Version 4.10 Sept. 5, 2025

We released a new schedule version!

We sadly had to cancel a session: “NixCI Demo” by syd

Version 4.9 Sept. 4, 2025

We released a new schedule version!

Version 4.8 Sept. 3, 2025

We released a new schedule version!

We have moved a session around: “Dendritic pattern” by Shahar "Dawn" Or (Sept. 5, 2025, 3 p.m. → Sept. 6, 2025, 1:30 p.m.)

Version 4.7 Sept. 1, 2025

We released a new schedule version!

We sadly had to cancel a session: “Snix in production” by flokli

Version 4.6 Aug. 28, 2025

We released a new schedule version!

We have a new session: “NixOS Mediation - a free mediation service” by Jonas Chevalier (zimbatm).

Version 4.5 Aug. 28, 2025

We released a new schedule version!

We have a new session: “Closing Ceremony” by Farhad Mehta.

We sadly had to cancel a session: “Flakes, and then?” by Valentin Gagarin

We had to move some sessions, so if you were planning on seeing them, check their new dates or locations:

• “Rewriting the Hydra Queue Runner in Rust” by Simon Hauser (Sept. 5, 2025, 11:30 a.m. → Sept. 5, 2025, 11:40 a.m.)
• “The Nix Binary Cache and AWS” by Tarus Balog (Sept. 5, 2025, 2:40 p.m. → Sept. 5, 2025, 3:35 p.m.)
• “What if GitHub Actions were local-first and built using Nix?” by Domen Kožar (Sept. 5, 2025, 10:35 a.m. → Sept. 5, 2025, 10:45 a.m.)
• “Flatpaks the Nix way” by Gabriele Modena (Sept. 5, 2025, 2:05 p.m. → Sept. 5, 2025, 3 p.m.)
• “Free Software (Talk and Discussion)” by Zoë Kooyman (Sept. 5, 2025, 3:15 p.m. → Sept. 5, 2025, 2:05 p.m.)
• “The bikes have been shed: The official Nix formatter” by Silvan Mosberger (Sept. 5, 2025, 11:30 a.m. → Sept. 6, 2025, 11 a.m.)
• “Sustainable Nix 2025 - State of the Union” by Ron Efroni (Sept. 5, 2025, 10:35 a.m. → Sept. 5, 2025, 10:45 a.m.)

Version 4.4 Aug. 18, 2025

We released a new schedule version!

We sadly had to cancel a session: “Hardening ssh sessions against quantum computers made easy with Nix(OS)” by Travis Van Sciver

We had to move some sessions, so if you were planning on seeing them, check their new dates or locations:

• “The Road
 Towards a 
NixOS UI” by Qubasa, Kenji Berthold (Sept. 5, 2025, 2:30 p.m. → Sept. 5, 2025, 2:25 p.m.)
• “Embarrassingly parallel evaluations” by Guillaume Maudoux (@layus) (Sept. 6, 2025, 3:30 p.m. → Sept. 6, 2025, 3:45 p.m.)
• “`nixos-compose`: Local development VMs made easy” by Sönke Hahn (Sept. 6, 2025, 2 p.m. → Sept. 6, 2025, 2:05 p.m.)
• “Ricochets” by Yvan Sraka (Sept. 5, 2025, 5:20 p.m. → Sept. 5, 2025, 5:25 p.m.)
• “My first Nix Aha!: A Newcomer’s Perspective” by Kavisha Kumar (Sept. 5, 2025, 4:30 p.m. → Sept. 5, 2025, 4:40 p.m.)
• “Sustainable Nix 2025 - State of the Union” by Ron Efroni (Sept. 5, 2025, 10:30 a.m. → Sept. 5, 2025, 10:35 a.m.)
• “Building a Nix Binary Cache for Fun and Profit*” by @techknowlogick (Sept. 5, 2025, 5:40 p.m. → Sept. 5, 2025, 5:45 p.m.)
• “Snix in production” by flokli (Sept. 5, 2025, 4 p.m. → Sept. 5, 2025, 3 p.m.)
• “Free Software (Talk and Discussion)” by Zoë Kooyman (Sept. 5, 2025, 3 p.m. → Sept. 5, 2025, 3:15 p.m.)
• “jail.nix - A library to easily jail your NixOS derivations in Bubblewrap” by Alex David (Sept. 5, 2025, 5:30 p.m. → Sept. 5, 2025, 5:35 p.m.)
• “Supply Chain Security Panel Discussion” by Martin Schwaighofer, Shahar "Dawn" Or, Julien Malka / Luj, Arian van Putten (Sept. 5, 2025, 4 p.m. → Sept. 5, 2025, 4:10 p.m.)
• “DerivationBuilder, extracting Nix's sandboxing logic for library use” by John Ericson (Sept. 6, 2025, 11:30 a.m. → Sept. 6, 2025, 11:35 a.m.)
• “When Not to Nix: Working with External Config and SOPS Nix” by Ryota (Sept. 6, 2025, 4 p.m. → Sept. 6, 2025, 4:05 p.m.)
• “A field guide to Nix at the Corporate” by Aleksander Gondek (Sept. 6, 2025, 3 p.m. → Sept. 6, 2025, 3:10 p.m.)
• “From Pixels to Pure Derivations: Deterministic Logos with Nix” by Daniel Baker (Sept. 6, 2025, 4 p.m. → Sept. 6, 2025, 4:15 p.m.)
• “Sponsored Lightning Talk - Flox” by Rok Garbas (Sept. 5, 2025, 5 p.m. → Sept. 5, 2025, 5:05 p.m.)
• “The Nix Binary Cache and AWS” by Tarus Balog (Sept. 5, 2025, 2:30 p.m. → Sept. 5, 2025, 2:40 p.m.)
• “What if GitHub Actions were local-first and built using Nix?” by Domen Kožar (Sept. 5, 2025, 10:30 a.m. → Sept. 5, 2025, 10:35 a.m.)
• “Life without Kubernetes: Hosting Mirrors with NixOS” by Sizhe Zhao (Sept. 5, 2025, 5 p.m. → Sept. 5, 2025, 5:10 p.m.)
• “Consulting Driven Open Source” by Jonas Chevalier (zimbatm) (Sept. 5, 2025, 5:15 p.m. → Sept. 5, 2025, 5:20 p.m.)
• “How I wish Bazel had nix develop” by Srini (Sept. 5, 2025, 5:10 p.m. → Sept. 5, 2025, 5:15 p.m.)
• “What *can't* be configured with Nix?” by June Stepp (Sept. 5, 2025, 5:30 p.m. → Sept. 5, 2025, 5:40 p.m.)
• “Applying Graph2Diff neural repair to build errors in nixpkgs” by Mutsuha Asada (Sept. 6, 2025, 5 p.m. → Sept. 6, 2025, 5:25 p.m.)
• “Flatpaks the Nix way” by Gabriele Modena (Sept. 5, 2025, 2 p.m. → Sept. 5, 2025, 2:05 p.m.)
• “Sponsored Lightning Talk - Determinate Systems” by Cole Mickens (Sept. 5, 2025, 5:05 p.m. → Sept. 5, 2025, 5:10 p.m.)
• “Nix-based development environments at Shopify (reprise)” by Josh Heinrichs (Sept. 5, 2025, 3 p.m. → Sept. 5, 2025, 4:10 p.m.)
• “Python packaging with nixpkgs, pyproject.nix & uv2nix” by adisbladis (Sept. 6, 2025, 11:30 a.m. → Sept. 6, 2025, 11:35 a.m.)
• “garn: A Faster, Friendlier Nix in TypeScript” by Julian Kirsten Arni (Sept. 6, 2025, 2:30 p.m. → Sept. 6, 2025, 2:25 p.m.)
• “systemd-sysupdate + systemd-repart + Nixos = ❤️ OTA Updates” by Jacek Galowicz (Sept. 5, 2025, 5:35 p.m. → Sept. 5, 2025, 5:40 p.m.)
• “NovaCustom: coreboot laptops and mini PCs, focused on privacy and customisation” by Wessel klein Snakenborg - NovaCustom (Sept. 6, 2025, 4:30 p.m. → Sept. 6, 2025, 4:35 p.m.)
• “Nix as a solution to embedded linux” by Óli (Sept. 6, 2025, 2:30 p.m. → Sept. 6, 2025, 2:40 p.m.)
• “Sponsored Lightning Talk - Cachix” by Domen Kožar (Sept. 5, 2025, 5:25 p.m. → Sept. 5, 2025, 5:30 p.m.)
• “Kubernetes on Nix” by Lux (Sept. 6, 2025, 4:30 p.m. → Sept. 6, 2025, 4:50 p.m.)
• “finix - an experimental os, featuring finit as pid 1, to explore the NixOS design space” by aanderse (Sept. 6, 2025, 3:30 p.m. → Sept. 6, 2025, 3:35 p.m.)
• “Is NixOS ready for the CRA?” by Lukas Beierlieb (Sept. 5, 2025, 3:30 p.m. → Sept. 5, 2025, 3:35 p.m.)

Version 4.2 Aug. 12, 2025

We released a new schedule version!

We had to move some sessions, so if you were planning on seeing them, check their new dates or locations:

• “ExpressVPN & Nix: Securing Privacy at Scale” by Samuel Tam (@usertam) (Sept. 6, 2025, 5 p.m. → Sept. 6, 2025, 5:05 p.m.)
• “Maintaining NixOS Stability for Years: CRA Compliance without Re-Certification” by Florian Pester (Sept. 6, 2025, 5:10 p.m. → Sept. 6, 2025, 5:15 p.m.)
• “Sponsored Lightning Talk - Flox” by Rok Garbas (Sept. 6, 2025, 4:25 p.m. → Sept. 5, 2025, 5 p.m.)
• “Nix in the Wild” by Ross Turk (Sept. 6, 2025, 5:15 p.m. → Sept. 6, 2025, 5:20 p.m.)
• “Nix Ninja – Incremental builds using dynamic derivations” by Edgar Lee (Sept. 6, 2025, 4:50 p.m. → Sept. 6, 2025, 4:55 p.m.)
• “NixCI Demo” by syd (Sept. 6, 2025, 4:45 p.m. → Sept. 6, 2025, 4:50 p.m.)
• “Recreational Receipt Printing” by Lillith "Infinidoge" (Sept. 6, 2025, 4:55 p.m. → Sept. 6, 2025, 5 p.m.)
• “Hardening ssh sessions against quantum computers made easy with Nix(OS)” by Travis Van Sciver (Sept. 6, 2025, 4:30 p.m. → Sept. 6, 2025, 4:35 p.m.)
• “How Jane Street does distributed Nix builds” by Aspen Smith (Sept. 6, 2025, 4:35 p.m. → Sept. 6, 2025, 4:40 p.m.)
• “What is Clan?” by Brian McGee (Sept. 6, 2025, 5:20 p.m. → Sept. 6, 2025, 5:25 p.m.)
• “Share your daemons with your peers” by Yannik Sander (Sept. 6, 2025, 4:40 p.m. → Sept. 6, 2025, 4:45 p.m.)
• “NovaCustom: coreboot laptops and mini PCs, focused on privacy and customisation” by Wessel klein Snakenborg - NovaCustom (Sept. 5, 2025, 5 p.m. → Sept. 6, 2025, 4:30 p.m.)
• “Styx: Faster substitution, less disk space” by David Reiss (Sept. 6, 2025, 5:25 p.m. → Sept. 6, 2025, 5:30 p.m.)
• “agenix-shell: secrets in your flake's shells, the Nix Way” by Andrea Ciceri (Sept. 6, 2025, 5:05 p.m. → Sept. 6, 2025, 5:10 p.m.)

Version 4.1 Aug. 10, 2025

We released a new schedule version!

We sadly had to cancel a session: “"All those years of fandom wiki maintenance are coming in handy" or "A vision forward for the NixOS Wiki from a contributor"” by DoggoBit

We had to move some sessions, so if you were planning on seeing them, check their new dates or locations:

• “How NixOS is built: From Pull Request to your `/nix/store`” by Dionysis Grigoropoulos (Sept. 6, 2025, 3:30 p.m. → Sept. 6, 2025, 3 p.m.)
• “finix - an experimental os, featuring finit as pid 1, to explore the NixOS design space” by aanderse (Sept. 6, 2025, 4 p.m. → Sept. 6, 2025, 3:30 p.m.)
• “Hardening ssh sessions against quantum computers made easy with Nix(OS)” by Travis Van Sciver (Sept. 6, 2025, 4:50 p.m. → Sept. 6, 2025, 4:30 p.m.)
• “Maintaining NixOS Stability for Years: CRA Compliance without Re-Certification” by Florian Pester (Sept. 6, 2025, 5:30 p.m. → Sept. 6, 2025, 5:10 p.m.)
• “Recreational Receipt Printing” by Lillith "Infinidoge" (Sept. 6, 2025, 5:15 p.m. → Sept. 6, 2025, 4:55 p.m.)
• “When Not to Nix: Working with External Config and SOPS Nix” by Ryota (Sept. 6, 2025, 4:30 p.m. → Sept. 6, 2025, 4 p.m.)
• “Nix Ninja – Incremental builds using dynamic derivations” by Edgar Lee (Sept. 6, 2025, 5:10 p.m. → Sept. 6, 2025, 4:50 p.m.)
• “What is Clan?” by Brian McGee (Sept. 6, 2025, 5:40 p.m. → Sept. 6, 2025, 5:20 p.m.)
• “Styx: Faster substitution, less disk space” by David Reiss (Sept. 6, 2025, 5:45 p.m. → Sept. 6, 2025, 5:25 p.m.)
• “Nix in the Wild” by Ross Turk (Sept. 6, 2025, 5:35 p.m. → Sept. 6, 2025, 5:15 p.m.)
• “agenix-shell: secrets in your flake's shells, the Nix Way” by Andrea Ciceri (Sept. 6, 2025, 5:25 p.m. → Sept. 6, 2025, 5:05 p.m.)
• “NixCI Demo” by syd (Sept. 6, 2025, 5:05 p.m. → Sept. 6, 2025, 4:45 p.m.)
• “Share your daemons with your peers” by Yannik Sander (Sept. 6, 2025, 5 p.m. → Sept. 6, 2025, 4:40 p.m.)
• “ExpressVPN & Nix: Securing Privacy at Scale” by Samuel Tam (@usertam) (Sept. 6, 2025, 5:20 p.m. → Sept. 6, 2025, 5 p.m.)
• “How Jane Street does distributed Nix builds” by Aspen Smith (Sept. 6, 2025, 4:55 p.m. → Sept. 6, 2025, 4:35 p.m.)
• “Sponsored Lightning Talk - Flox” by Rok Garbas (Sept. 6, 2025, 4:45 p.m. → Sept. 6, 2025, 4:25 p.m.)

Version 4.0 Aug. 7, 2025

We released a new schedule version!

We have new sessions!

• “Hackiest”
• “Hackier”
• “Hackiest”
• “Hackier”
• “Hack”
• “Hack”

Version 2.0 Aug. 7, 2025

We released a new schedule version!

We have new sessions!

• “Embarrassingly parallel evaluations” by Guillaume Maudoux (@layus)
• “`nixos-compose`: Local development VMs made easy” by Sönke Hahn
• “"All those years of fandom wiki maintenance are coming in handy" or "A vision forward for the NixOS Wiki from a contributor"” by DoggoBit
• “Recreational Receipt Printing” by Lillith "Infinidoge"
• “My first Nix Aha!: A Newcomer’s Perspective” by Kavisha Kumar
• “Sustainable Nix 2025 - State of the Union” by Ron Efroni
• “Building a Nix Binary Cache for Fun and Profit*” by @techknowlogick
• “What is Clan?” by Brian McGee
• “You can't spell "devshell" without "hell"” by Zach Mitchell
• “Rewriting the Hydra Queue Runner in Rust” by Simon Hauser
• “How To Fix Infinite Recursion” by lennart, berber
• “NixCI Demo” by syd
• “How Jane Street does distributed Nix builds” by Aspen Smith
• “The Nix Binary Cache and AWS” by Tarus Balog
• “Introducing NixOps4” by Robert Hensing
• “What if GitHub Actions were local-first and built using Nix?” by Domen Kožar
• “Consulting Driven Open Source” by Jonas Chevalier (zimbatm)
• “How I wish Bazel had nix develop” by Srini
• “How NixOS is built: From Pull Request to your `/nix/store`” by Dionysis Grigoropoulos
• “What *can't* be configured with Nix?” by June Stepp
• “finix - an experimental os, featuring finit as pid 1, to explore the NixOS design space” by aanderse
• “Hardening ssh sessions against quantum computers made easy with Nix(OS)” by Travis Van Sciver
• “Maintaining NixOS Stability for Years: CRA Compliance without Re-Certification” by Florian Pester
• “Steering Committee & Foundation Board Panel” by Nix Steering Committee, NixOS Foundation board
• “Nix-based development environments at Shopify (reprise)” by Josh Heinrichs
• “Python packaging with nixpkgs, pyproject.nix & uv2nix” by adisbladis
• “garn: A Faster, Friendlier Nix in TypeScript” by Julian Kirsten Arni
• “systemd-sysupdate + systemd-repart + Nixos = ❤️ OTA Updates” by Jacek Galowicz
• “agenix-shell: secrets in your flake's shells, the Nix Way” by Andrea Ciceri
• “Share your daemons with your peers” by Yannik Sander
• “Nix as a solution to embedded linux” by Óli
• “ExpressVPN & Nix: Securing Privacy at Scale” by Samuel Tam (@usertam)
• “Sponsored Lightning Talk - Cachix” by Domen Kožar
• “Kubernetes on Nix” by Lux
• “Sponsored Lightning Talk - Determinate Systems” by Cole Mickens
• “Free Software (Talk and Discussion)” by Zoë Kooyman
• “The Road
 Towards a 
NixOS UI” by Qubasa, Kenji Berthold
• “Ricochets” by Yvan Sraka
• “When Not to Nix: Working with External Config and SOPS Nix” by Ryota
• “Nix Ninja – Incremental builds using dynamic derivations” by Edgar Lee
• “Snix in production” by flokli
• “Opening Ceremony”
• “jail.nix - A library to easily jail your NixOS derivations in Bubblewrap” by Alex David
• “Dendritic pattern” by Shahar "Dawn" Or
• “Supply Chain Security Panel Discussion” by Martin Schwaighofer, Shahar "Dawn" Or, Julien Malka / Luj, Arian van Putten
• “NovaCustom: coreboot laptops and mini PCs, focused on privacy and customisation” by Wessel klein Snakenborg - NovaCustom
• “DerivationBuilder, extracting Nix's sandboxing logic for library use” by John Ericson
• “NixOS on LoongArch64” by Aleksana, Weijia Wang
• “A field guide to Nix at the Corporate” by Aleksander Gondek
• “From Pixels to Pure Derivations: Deterministic Logos with Nix” by Daniel Baker
• “A Journey into Nix with Flox (& how to convince your boss, security department, peers, neighbours)” by Tanja Ulianova
• “Life without Kubernetes: Hosting Mirrors with NixOS” by Sizhe Zhao
• “Continuously Integrating Your Nix Config” by João Thallis, Claudio Neto
• “Applying Graph2Diff neural repair to build errors in nixpkgs” by Mutsuha Asada
• “Flatpaks the Nix way” by Gabriele Modena
• “Mastering NixOS Integration Tests: Advanced Techniques for Fast and Robust Multi-VM Tests” by Jacek Galowicz
• “Is NixOS ready for the CRA?” by Lukas Beierlieb
• “Styx: Faster substitution, less disk space” by David Reiss
• “Nix in the Wild” by Ross Turk
• “Getting Started with Nix: Common Mistakes and How to Dodge Them” by Rok Garbas
• “Internet scale routing with NixOS” by Yifei Sun
• “Flakes, and then?” by Valentin Gagarin
• “The bikes have been shed: The official Nix formatter” by Silvan Mosberger
• “Sponsored Lightning Talk - Flox” by Rok Garbas

Version 1.0 Aug. 7, 2025

We released our first schedule!