# Running Interactive VMs with `disko`

disko now exports its own flavor of interactive VMs (similiar to
config.system.build.vm). Simply import the disko module and build the vm runner
with:

```bash
nix run -L '.#nixosConfigurations.mymachine.config.system.build.vmWithDisko'
```

You can configure the VM using the `virtualisation.vmVariantWithDisko` NixOS
option:

```nix
{
  virtualisation.vmVariantWithDisko = {
    virtualisation.fileSystems."/persist".neededForBoot = true;
    # For running VM on macos: https://www.tweag.io/blog/2023-02-09-nixos-vm-on-macos/
    # virtualisation.host.pkgs = inputs.nixpkgs.legacyPackages.aarch64-darwin;
  };
}
```

Extra configuration that is set in `disko.tests.extraConfig` is also applied to the
interactive VMs. The image size of the VMs will be determined by the 
`disko.devices.disk.<name>.imageSize` 
specifications. The memory size is set by `disko.memSize`.