anchor.diff:            -name ${vmName} \
             -m ${toString config.virtualisation.memorySize} \
             ${optionalString (pkgs.stdenv.system == "x86_64-linux") "-cpu kvm64"} \
  -          ${concatStringsSep " " config.virtualisation.qemuNetworkingOptions} \
  +          ${concatStringsSep " " config.virtualisation.qemu.networkingOptions} \
             -virtfs local,path=/nix/store,security_model=none,mount_tag=store \
             -virtfs local,path=$TMPDIR/xchg,security_model=none,mount_tag=xchg \
             -virtfs local,path=''${SHARED_DIR:-$TMPDIR/xchg},security_model=none,mount_tag=shared \
  
positive.code:         description = "Primary IP address used in /etc/hosts.";
        };
  
      virtualisation.qemu.options =
        mkOption {
          default = [];
          example = [ "-vga std" ];
          description = "Options passed to QEMU.";
        };
  
      virtualisation.useBootLoader =
        mkOption {
  
negative.code:           '';
        };
  
      virtualisation.graphics =
        mkOption {
          default = true;
  