anchor.diff:    # Build the initial ramdisk so Hydra can keep track of its size over time.
     initialRamdisk = buildFromConfig ({ pkgs, ... }: { }) (config: config.system.build.initialRamdisk);
   
  -  netboot = {
  -    x86_64-linux = makeNetboot {
  -      system = "x86_64-linux";
  -      modules = [
  -        ./modules/installer/netboot/netboot-minimal.nix
  -        versionModule
  -      ];
  -    };
  -  } // (optionalAttrs (elem "aarch64-linux" supportedSystems) {
  -    aarch64-linux = makeNetboot {
  -      system = "aarch64-linux";
  -      modules = [
  -        ./modules/installer/netboot/netboot-minimal.nix
  -        versionModule
  -      ];
  -    };});
  +  netboot = forTheseSystems [ "x86_64-linux" "aarch64-linux" ] (system: makeNetboot {
  +    inherit system;
  +    modules = [
  +      ./modules/installer/netboot/netboot-minimal.nix
  +      versionModule
  +    ];
  +  });
   
     iso_minimal = forAllSystems (system: makeIso {
       module = ./modules/installer/cd-dvd/installation-cd-minimal.nix;
  
positive.code: 
    # A variant with a more recent (but possibly less stable) kernel
    # that might support more hardware.
    iso_minimal_new_kernel = genAttrs [ "x86_64-linux" ] (system: makeIso {
      module = ./modules/installer/cd-dvd/installation-cd-minimal-new-kernel.nix;
      type = "minimal-new-kernel";
      inherit system;
  
negative.code: 
  
    # A bootable VirtualBox virtual appliance as an OVA file (i.e. packaged OVF).
    ova = forTheseSystems [ "x86_64-linux" ] (system:
  
      with import nixpkgs { inherit system; };
  
  