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NixOS Reproducible Builds

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11 Jul 2024
@atemu12:matrix.orgAtemuSomething working in one snapshot is no guarantee that it works the next time01:15:00
@raboof:matrix.orgraboofIn this case 'the ISO is reproducible' meant 'we rebuilt it from source and it produced the same binary'06:09:50
@raboof:matrix.orgraboofwe have seen a nondeterminism in jfsutils in the past and haven't fixed it, so we suspect it is still there, but it 'often' does produce the same binary06:10:58
@bbenno:matrix.orgbbennoq08:43:50
@emilazy:matrix.orgemilyJFS is basically unmaintained and has been on the long road to probable removal from the kernel for years, is it even worth keeping? I guess if it helps shake out toolchain bugs10:27:57
@emilazy:matrix.orgemilyAmazon Linux and probably other distros have already disabled it10:28:08
@atemu12:matrix.orgAtemuWhat's even pulling it in?10:29:01
@emilazy:matrix.orgemily I assumed jfsutils was just being included explicitly so you can install on JFS 10:32:18
@emilazy:matrix.orgemilysince it's enabled in the kernel10:32:23
@emilazy:matrix.orgemily yeah, nixos/modules/tasks/filesystems/jfs.nix 10:32:31
@emilazy:matrix.orgemilydisabling it to increase the reproducibility stats does feel a little Goodhart's law though :)10:35:07
@atemu12:matrix.orgAtemuGiven jfs' status, I think it's time to disable it anyways10:35:42
@atemu12:matrix.orgAtemuWe don't need to carry such baggage forever10:35:54
@emilazy:matrix.orgemilyFWIW it's not "officially" deprecated upstream, there was just a suggestion to do so years ago, and once in a blue moon it gets a bugfix, but my understanding is that it sees much less attention than any "active" general-purpose filesystems and its reliability might not be in a great place10:37:13

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