scaryzfs is a Nix flake that allows you to take manual control of the ZFS sources being used in your nixos configuration, and use a fork or pull request from ZFS upstream, despite the danger in doing so, in order to test or use more recent Linux kernel versions with ZFS on NixOS.
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This should only really be used in a VM (nix microvm/full nixos on libvirt) for testing purposes right? I think that should be mentioned in the README. Nice shim though.
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Is the iKnowTheRisks = true option not enough?
I’m using this on my GPD Pocket 4 because only 6.15 has the fixes needed for my GPU.
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Yeah okay, didn’t see that 
sounds like enough but maybe a link to said risks could be nice?
How does that work? How is a filesystem function dependent on which GPU is used?
How is a filesystem function dependent on which GPU is used?
In order to use the GPU fixes in the latest kernel, I need to run the latest kernel. Which means I need to use the latest ZFS, because an older ZFS is not able to be used with the newer kernel.
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Nice!
Another suggestion for your future ideas section:
- a vm test that runs the ZTS from the relevant revision
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Thanks to emilazy for putting up with a bunch of questions about how ZFS is built in Nixpkgs
She’s the best. Thanks for this flake and work, @matthewcroughan!
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Well someone needs to test zfs upfront and not all bugs are reproducible in VMs. I would be concerned about the projects if not even developers of the filesystem would be brave enough to run master on their system.