Offline automated installation images for Disko

Different-Name · March 7, 2026, 11:09am

I’ve opened a PR for Disko that adds NixOS installer image generation to the flake-parts module

This means you can easily partition, create file systems, and install a hosts configuration with a single command, without network access from a simple installer image

I encourage anyone to check it out, and leave feedback or show your support if you want this to be merged! I’ve included some example usage on the PR

github.com/nix-community/disko

feat: add flake-parts installer image options

master ← different-name:flake-offline-installer

opened 09:56AM - 03 Mar 26 UTC

different-name

+201 -33

Creating an offline installer configuration is [already demonstrated in the disk…o docs](https://github.com/nix-community/disko/blob/master/docs/disko-install.md#example-for-a-nixos-installer), however it's pretty dense and I think a module would be a great replacement for copying that large chunk of code from the docs This PR adds the `disko-install` option set to the flake-parts module, which generates installer images with dependencies & install script included Minimal config: ```nix disko-install.hosts = { my-host.disks.main = /dev/disk/by-id/some-disk-id; }; ``` Exhaustive config: ```nix disko-install.hosts = { my-host = { nixosConfiguration = "my-host"; disks.main = /dev/disk/by-id/some-disk-id; image = { formats = [ "iso-installer" "hyperv" ]; modules = [ /*<nixos module>*/ ]; }; script = { name = "my-cool-installer"; extraArgs = [ "--dry-run" ]; }; }; }; ``` ### TODO This works to generate installer images (I have tested with `iso-installer`) with a `install-nixos-unattended` script, however it still needs work: - Stricter typing for formats option, as it currently is just `listOf str` - Documentation - Tests?