GNU Guix is growing rapidly and has gone from a software packaging system to a full tool stack aimed at reproducible software deployment and development.
GNU Guix is a toolkit that allows developers to integrate reproducible software deployment into their applications—as opposed to leaving it up to the user. GNU Guix is based on the GNU Guile programming language which makes it a very versatile and hackable (in the good sense) environment.
When?
The two days after FOSDEM:
- Monday, February 2nd 2026
- Tuesday, February 3rd 2026
The ICAB is unfortunately not well suited for wheelchairs as there are many steps between rooms though we help where we can.
Programme
We will have some talks in the morning and hacking and discussions the rest of the day. Two days of GNU Guix bliss.
The event targets an audience of Guix developers and users.
In pure “unconference” style, the program will be made by participants as we go, with hands-on sessions organized in sub-groups. Possible session topics:
Guix Foundation update: crowdfunding campaign and upcoming actions
Unification of the Guile ecosystem communication and project management
Sustaining our infrastructure: planning to keep qa.guix, data.guix, ci.guix, etc. afloat
BLUE - A generic build-system crafted entirely in Guile. Where we are and where we go
Improving the developer experience of Guile and how BLUE did it
Supporting GNU Guix for long-term use: releases, distributions, and security
Developer Workflow Show & Tell: Let's share how we work with Guix and approach common use-cases.
Reflecting on the branching workflow: the good, the bad, and ways we could improve
One year after the user survey: what we addressed, what has yet to be done
Creative Writing: Can we write some quirky fiction to give users a practical learning journey into Guix?
Using Arei/Ares IDE with Guix-based projects
On building trust: From Authentication to Attestation
Java packaging
Looking at modern Nix for things to take inspiration from
Add your own topics above!
Code of conduct
Be aware that attendees implicitly abide by the code of conduct as stated by FOSDEM. As this is a FOSDEM fringe event the organizers can be contacted in case of a problem.
You can contact the organisers by sending a message to Manolis <manolis837@gmail.com> or Pjotr <pjotr.public12@thebird.nl>. Please email us if you would need on-site childcare to be able to attend.
We also have a Matrix room in case you'd like to come chat with us before the event.
Tobias Alexandra Platen (they/them) -> Breanndán Ó Nualláin
Kurt Kremitzki
Tanguy Le Carrour
Noé Lopez
Wilko Meyer
Rodion Goritskov
Yvan Sraka
Jean-Baptiste Note
Fredrik Salomonsson (I can only attend the first day)
Arjan Adriaanse (will pay for ticket with cash)
Sergio Pastor Pérez
Gabriel <gabber> Wicki (will buy the ticket next time i leave my bed)
Andy Wingo
Christine Lemmer-Webber
Jessica Tallon
David Thompson
Andreas Enge
Jelle Licht
Simon Josefsson (monday only, not booked hotel/flight yet)
Olivier Rojon
Bo
Thomas Bouvier
Rostislav Svoboda
Petr
James K. Lowden
Yan Abu Arab
Julien Lepiller
Yunqi Shao (yqshao)
Picnoir
Nils N. Haukås
Laurent Gatto
Ben (canterel)
Lesik
Gabor Boskovits
Jonathan Frederickson
Efraim Flashner
Oleg Bocharov (Sharlatan Hellseher)
Brennan Vincent
Cielle
Amy Pillow
Frank Pursel
Kerstin (erictapen)
Hugo Buddelmeijer (woohoo, in the nick of time❣️)
Andrew Tropin
Jérémie Salvucci
Registration is closed at **60 participants**. Unfortunately the number of seats is limited.
Tickets and Costs
The event costs between €3000 - €3500 Euros to run, so to cover the costs we are ticketing the event. The ticketing is organised through Open Collective on the Guix Days 2026 Event page. There are three levels of ticket:
This ticket makes a significant contribution to the the event's costs. Choose this ticket if you're attending in a professional capacity and can justify that attendance as a business, corporate or organisational expense.
This ticket is for anyone for whom the general ticket is too expensive. We want Guix Days to be accessible to all, just like GNU Guix is.
Each ticket entitles a single person to attend both days of the event. There's tea/coffee provided mid-morning and mid-afternoon and a full lunch. The ticket registration is overseen by the Guix Foundation, please contact Steve or Tanguy through the Open Collective page if there are any problems - we'll be happy to help!
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