# FOSDEM 2026 (EESSI)

https://fosdem.org/2026/schedule/tracks/

## Talks

Options w.r.t. devrooms to submit talks to:

### 1) Bioinformatics `[Sat, 2nd half of day]`

*deadline: Sun 30 Nov 2025* ([CfP link](https://lists.fosdem.org/pipermail/fosdem/2025q4/003648.html))

- something about combining Nextflow with EESSI?
- see also https://github.com/nf-core/proposals/issues/103
- short talk (10min) vs long talk (10min)
- submitter: Thomas
- moving pipeline from x86_64 to Arm
- draft: https://hackmd.io/3RlAzPwORM-n7vEPv8IZcQ

### 2) HPC devroom `[Sun, full day]`

*deadline: Mon 1 Dec 2025* ([CfP link](https://hpc-bigdata-fosdem26.github.io/))

- general update on EESSI?
- last time was at FOSDEM 2021 (virtual edition) by Bob, see https://archive.fosdem.org/2021/schedule/event/eessi/
- submitter: Helena

### 3) Package Management `[Sat, first half of day]`

*deadline: Mon 1 Dec 2025* ([CfP link](https://lists.fosdem.org/pipermail/fosdem/2025q4/003693.html))

- (Kenneth) sequel to "How To Make Package Managers Cry" *(already submitted)*
- (Loris+Kenneth) Spack on top of EESSI

### 4) Testing and Continuous Delivery `[Sun, full day]`

*deadline: Mon 1 Dec 2025*

- ***(overlaps with HPC devroom)***
- **very competitive devroom**
- EESSI test suite
- something about EESSI test suite, portable tests with ReFrame?
- submitter: Sam
- using EESSI in CI
- submitter: Lara

### 5) Software Performance `[Sun, full day]`

*deadline: Sun 30 Nov 2025* ([CfP link](https://lists.fosdem.org/pipermail/fosdem/2025q4/003692.html))

- ***(overlaps with HPC devroom)***
- not that many submissions currently...
- submitter: Kenneth
- draft: https://hackmd.io/LXZmuTDdTJi-cQKkG6AZ-w

### 6) Collaboration and Content Management (that’s maybe a stretch)

- ...

### 7) Containers `[Sat, first half of day]`

- with a “containers without the containing” pitch on EESSI?

### 8) Distributions `[Sun, full day]`

*deadline: Mon 1 Dec 2025*

- ***(overlaps with HPC devroom)***
- from CfP:

  * Delivering multiple-architecture or architecture-agnostic software.
  * Building commmunity around distributions.
  * Emerging technologies in the Linux ecosystem.

### 9) Open Research `[Sun, full day]`

*deadline: Mon 1 Dec 2025*

- ***(overlaps with HPC devroom)***
- reproducibility
- making it easy to jump between systems

### 10) RISC-V `[Sat, full day]`

- probably not a good timing yet, better aim for FOSDEM'27 ?

### 11) LLVM `[Sat, 2nd half of day ]`

- something about LLVM toolchain effort in EasyBuild?

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## Stand

- deadline Sun 9 Nov


Track
-> Developer environment?
-> System administration?

Project Description:

Secondary contact person -> somebody from the slack thread?

Project description:

**EESSI -- A single software stack from Raspberry Pis to supercomputers**

Are you tired of having to install the software needed for your research, development, or project over and over across different systems? The European Environment for Scientific Software Installations (EESSI, https://eessi.io) comes to the rescue!

This open-source, community-driven, and European-funded initiative provides a centralized and portable software stack designed for anybody working across High-Performance Computing (HPC) clusters, cloud platforms, and even personal workstations. By combining several FOSS projects like CernVM-FS (CVMFS), Gentoo Prefix, EasyBuild, Lmod and, ReFrame, EESSI ensures that high-quality, optimized scientific software can be deployed once and used everywhere, without the hassle of compiling, dependency conflicts, or system incompatibilities.

The goal of EESSI is to create a unified software ecosystem for scientific computing, enabling reproducibility, collaboration, and efficiency, avoiding duplicating work among system administrators and user support teams across the world. In it you will find common (FOSS) toolchains, interpreters and scientific software. Right now it includes more than 1.000 software installations!

In short, EESSI bridges the gap between HPC architectures, cloud environments, and accelerates research while reducing maintenance overhead. EESSI makes your software environment reliable, reproducible, and ready to scale.

- why do we want to be at FOSDEM?

We want to show the easyness of EESSI by demoing it on a supercomputer, normal laptop, an ARM system and a RISC-V system. We want to engage with the FOSDEM community to learn how we can further improve EESSI.

- anything else we want to add?
- (KH) impact of combining several FOSS projects to make something bigger
- (KH) think outside the box, beyond established approaches ("streaming" software installations through CernVM-FS, shared software stack across systems & sites, ...)

- Why do people that come to FOSDEM may watch your project?

FIXME

- Do you like to be placed next to a specific project?

No (but maybe we need a better answer here?)

## Pkg Mgmt devroom

- CernVM-FS with EESSI as repo example
- Helena + Kenneth?

### HPC devroom

- Helena + Lara?
- update on EESSI
- shared software stack for EuroHPC systems and beyond (EOSC, etc.)