anchor.diff:              maintainers = maintainers.eelco;
             };
             ova = config.system.build.virtualBoxOVA;
  +          preferLocalBuild = true;
           }
           ''
             mkdir -p $out/nix-support
  
positive.code:             boot.loader.grub.device = mkDefault "/dev/sda";
            });
        }).config.system.build.toplevel;
      }
      "mkdir $out; ln -s $toplevel $out/dummy");
  
  
negative.code:           };
            inherit iso;
            passthru = { inherit config; };
            preferLocalBuild = true;
          }
          ''
            mkdir -p $out/nix-support
  