anchor.diff:  
     # 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 {
  +  iso_minimal_new_kernel = forTheseSystems [ "x86_64-linux" ] (system: makeIso {
       module = ./modules/installer/cd-dvd/installation-cd-minimal-new-kernel.nix;
       type = "minimal-new-kernel";
       inherit system;
  
positive.code:   # 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
        ];
      };});
  
    iso_minimal = forAllSystems (system: makeIso {
      module = ./modules/installer/cd-dvd/installation-cd-minimal.nix;
  
negative.code:     inherit system;
    });
  
    iso_graphical = forTheseSystems [ "x86_64-linux" ] (system: makeIso {
      module = ./modules/installer/cd-dvd/installation-cd-graphical-kde.nix;
      type = "graphical";
      inherit system;
  