This page was for tracking anything related with the 2019 GNU Guix/Guile conference and hackathon on Jan. 31st and Feb. 1st — right before FOSDEM 2019 and the minimalistic language devroom.

Logo of the Guix Days

Annual GNU Guix (un)conference. This event is a FOSDEM 2019 fringe event.


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.


Thursday 31st of January and Friday 1st of February, 2019, the two days before FOSDEM.

Coffee at 9:30AM, and starting at 10AM.


Institute of Cultural Affairs (ICAB) Rue Amedee Lynen 8 1210 Brussels (map), Belgium.


We had some talks in the morning and hacking and discussions the rest of the day. Two days of GNU Guix bliss.

The event targeted an audience of Guix developers and users.

In pure "unconference" style, the program was made by participants as we went, with hands-on sessions organised in subgroups. Session topics included:

  1. GNU Guix road map
  2. GNU Guix online documentation
  3. Mes and bootstrapping
  4. Reproducibility project
  5. Alternative target architectures (ARM etc.)
  6. Developing workflows (GNU Guix and GNU Workflow Language)
  7. Support for D in GNU Guix
  8. Demonstration and explanation of The Perfect Setup (Emacs, Geiser, Magit)
  9. Demonstration and live-hacking of Next browser + introduction to the code base
  10. Better build systems for JVM languages in GNU Guix (support maven, sbt, gradle, ...)
  11. Reproducible JDK
  12. The GuixSD installer
  13. your topic?

Code of conduct

Attendees implicitely abode by the code of conduct as stated by FOSDEM.


  1. Ludovic Courtès
  2. Jonathan Brielmaier
  3. Tobias (nckx) Geerinckx-Rice
  4. Julien Lepiller
  5. Chris Webber
  6. Ricardo Wurmus
  7. Pjotr Prins
  8. Manolis Ragkousis
  9. Alex Sassmannshausen
  10. Andy Wingo
  11. Christopher Baines
  12. Gábor Boskovits
  13. Clément Lassieur (Friday only)
  14. Mathieu Othacehe (Friday only)
  15. Pierre Neidhardt
  16. Björn Höfling
  17. Leo Famulari
  18. Jan (janneke) Nieuwenhuizen
  19. Efraim Flashner
  20. Danny Milosavljevic
  21. Mark Meyer
  22. Tobias "Tomoko" Platen
  23. Marco van Hulten — arriving afternoon of 2nd day
  24. Laura Lazzati
  25. Mike Gran
  26. Chris Marusich
  27. Jelle Licht
  28. Andreas Enge
  29. Simon Tournier
  30. Danny Milosavljevic
  31. Andy Patterson
  32. Profpatsch
  33. Christian Jaeger
  34. Matias Jose
  35. Adu O'Hara


Attendance was free. We asked for a voluntary contribution for consumptions.


Sessions Outcome

Maven Build System

Quality Assurance and Continuous Integration



Source code of this site.