Task("ZipIt")
    .Does(() =>
{
    SevenZip(new SevenZipSettings
    {
        Command = new AddCommand
        {
            Files = new FilePathCollection(new[] { new FilePath("a.txt"), new FilePath("b.txt") }),
            Archive = new FilePath("out.zip"),
            Volumes = new SwitchVolumeCollection(
                new SwitchVolume
                {
                    Size = 1,
                    Unit = VolumeUnit.Gigabytes
                })
        }
    });
});