host doctorin {
        fixed-address 1.2.3.4;
        hardware ethernet 00:11:22:33:44:55;
        next-server tftphost;
        server-name "nfshost";
        if substring (option vendor-class-identifier, 0, 9) = "PXEClient" {
                filename "arm64/bootaa64.efi";
        } else {
                filename "nfs:doctorin/netbsd";
                option root-path "/export/root/doctorin";
        }
        option dhcp-client-identifier "doctorin-the-tardis";
}