36 lines
933 B
Markdown
36 lines
933 B
Markdown
# netboot.nix
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Alternative expressions for netboot.
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In the future, I'd like to structure this as a module, to easily
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turn on recursive Nix builds, or target a ZFS filesystem, etc.
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Also, the future should include tests in this repo.
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## Included Module Expressions
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* `./quickly.nix` uses recursive Nix to build the initrd and squashfs
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filesystems more quickly, allowing for faster iteration of images.
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Initial testing reduced build time from 5-10 minutes per image to
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15-30 seconds.
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The `./size-test/build.sh` test is able to build an incremental
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netboot image in just 12 seconds, and the initrd is not rebuilt.
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## Setting up recursive nix
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Setting up recursive Nix requires support on the build machine:
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```nix
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{ pkgs, ... }: {
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nix = {
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package = pkgs.nixUnstable;
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systemFeatures = [ "recursive-nix" "kvm" "nixos-test" ];
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extraOptions = ''
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experimental-features = recursive-nix
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'';
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};
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}
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```
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