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From: Arun Isaac <arunisaac@systemreboot.net>
To: guix-science@gnu.org
Cc: ravanan@systemreboot.net
Subject: Guix, CWL, ravanan and reproducibility talk at UCL
Date: Wed, 22 Apr 2026 11:59:26 +0100
Message-ID: <87cxzrb6r5.fsf@systemreboot.net>
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List-Id: <ravanan.systemreboot.net>


Hi,

I am a postdoc at University College London (UCL). I have been working
on ravanan[1] for a few years now. ravanan is a Common Workflow
Language (CWL) runner that uses Guix to provide strong reproducibility
guarantees and content-addressed caching.

Yesterday, I gave a talk in my department at UCL on Guix, CWL, ravanan
and reproducibility. The slides are at
https://files.systemreboot.net/ucl-guix-ravanan-seminar.pdf

To the bioinformaticians reading this, it may be of interest that we
ported pggb (the pangenome building pipeline) from the original bash
script to CWL. Links to the original and the port below:

https://github.com/pangenome/pggb
https://github.com/arunisaac/pggb.cwl

Regards,
Arun

[1]: https://forge.systemreboot.net/ravanan/