rb-debugging meeting minutes

Bernhard M. Wiedemann bernhardout at lsmod.de
Mon Dec 7 19:12:30 UTC 2020

A bit delayed are the meeting minutes from our IRC meeting on debugging
reproducibility issues:


Here is a dump of the etherpad notes for that topic:

bmwiedemann once wrote
which contains some openSUSE-specific parts, but also plenty
distribution-agnostic steps

do similar guides exist for Arch and Debian?
https://wiki.debian.org/ReproducibleBuilds/Howto - a bit out-of-date and

How do you do

    double-build (with some variations)

    Debian: reprotest ; has --auto-build for autoclassify and can keep
diffs with only one source of non-determinism

    verification build (compare local build result with official build)

    Archlinux: rebuilderd + archlinux-repro ; no reprotest yet

    nix: first "nix-build '<nixpkgs'> -A packagename" to fetch the
official build from the cache, then the same command but with an
additional '--check' parameter to rebuild and verify. No reprotest yet.

    compare noarch builds between i586 and x86_64 (aka amd64)

      Debian does this on tests.reproducible-builds.org i386 tests (one
build with 686-pae kernel, one with amd64 kernel)

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