anchor.diff:        --disallow-untyped-defs \
         $out
     '';
  +
  +  finalSystemdBootBuilder = pkgs.writeScript "install-systemd-boot.sh" ''
  +    #!${pkgs.runtimeShell}
  +    ${checkedSystemdBootBuilder} "$@"
  +    ${cfg.extraInstallCommands}
  +  '';
   in {
   
     imports =
  
positive.code: 
          `null` means no limit i.e. all generations
          that were not garbage collected yet.
        '';
      };
  
  
negative.code:     ];
  
      system = {
        build.installBootLoader = finalSystemdBootBuilder;
  
        boot.loader.id = "systemd-boot";
  
  