anchor.diff:        description = ''
           Extra contents appended to the libvirtd configuration file,
           libvirtd.conf.
  +      '';
  +    };
  +
  +    virtualisation.libvirtd.qemuVerbatimConfig = mkOption {
  +      type = types.lines;
  +      default = ''
  +        namespaces = []
  +      '';
  +      description = ''
  +        Contents written to the qemu configuration file, qemu.conf.
  +        Make sure to include a proper namespace configuration when
  +        supplying custom configuration.
         '';
       };
   
  
positive.code:     auth_unix_ro = "none"
      auth_unix_rw = "none"
      ${cfg.extraConfig}
    '';
  
  in {
  
negative.code:             cp -npd ${pkgs.libvirt}/var/lib/$i /var/lib/$i
          done
  
          # Copy generated qemu config to libvirt directory
          cp -f ${qemuConfigFile} /var/lib/libvirt/qemu.conf
  
          # libvirtd puts the full path of the emulator binary in the machine
          # config file. But this path can unfortunately be garbage collected
          # while still being used by the virtual machine. So update the
  