anchor.diff:    # Shell script to start the VM.
     startVM =
       ''
  -      #! ${pkgs.runtimeShell}
  +      #! ${cfg.host.pkgs.runtimeShell}
  +
  +      export PATH=${makeBinPath [ cfg.host.pkgs.coreutils ]}''${PATH:+:}$PATH
   
         set -e
   
  
positive.code:         description = "Primary IP address used in /etc/hosts.";
        };
  
      virtualisation.qemu = {
        package =
          mkOption {
            type = types.package;
            default = pkgs.qemu_kvm;
            example = "pkgs.qemu_test";
            description = lib.mdDoc "QEMU package to use.";
          };
  
negative.code: 
      services.qemuGuest.enable = cfg.qemu.guestAgent.enable;
  
      system.build.vm = cfg.host.pkgs.runCommand "nixos-vm" {
        preferLocalBuild = true;
        meta.mainProgram = "run-${config.system.name}-vm";
      }
        ''
          mkdir -p $out/bin
          ln -s ${config.system.build.toplevel} $out/system
          ln -s ${cfg.host.pkgs.writeScript "run-nixos-vm" startVM} $out/bin/run-${config.system.name}-vm
        '';
  
      # When building a regular system configuration, override whatever
  