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25 lines
803 B
Markdown
25 lines
803 B
Markdown
# ISO
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Making and writing an installable iso for `hosts/NixOS.nix` is as simple as:
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```sh
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flk iso NixOS
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dd bs=4M if=result/iso/*.iso of=/dev/$your_installation_device \
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status=progress oflag=sync
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```
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This works for any file matching `hosts/*.nix` excluding `default.nix`.
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## ISO image nix store & cache
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The iso image holds the store to the live environment and _also_ acts as a binay cache
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to the installer. To considerably speed up things, the image already includes all flake
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`inputs` as well as the `devshell` closures.
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While you _could_ provision any machine with a single stick, a bespoke iso maximises
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those local cache hits.
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For hosts that don't differ too much, a common usb stick might be ok, whereas when
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there are bigger differences, a bespoke usb stick will be considerably faster.
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