```cs
const string libroot = "libroot.so";
const string libgcc_s = "libgcc_s.so.1";

var pkg = new BetterPkg();

pkg.Name = "libroot_unwind";
pkg.Description = "libroot with LLVM libunwind support.";
pkg.Summary = "libroot with LLVM libunwind support.";
pkg.BetterVersion = new BetterPkgVersion()
{
    Major = "12",
    Minor = "0",
    Micro = "1",
    PreRelease = "beta",
    Revision = 1
};
pkg.Architecture = PkgArchitecture.X86_64;
pkg.Packager = $"HpkgReader by trungnt2910, on .NET {Environment.Version}";
pkg.Vendor = "trungnt2910";
pkg.Copyrights = new List<string>()
{
    "2003-2019 University of Illinois at Urbana-Champaign",
    "2001-2021 Haiku, Inc. et al"
};
pkg.Licenses = new List<string>()
{
    "Apache v2 with LLVM Exception",
    "MIT"
};
pkg.SourceUrls = new List<BetterPkgUrl>()
{
    new BetterPkgUrl("Experimental Haiku fork with libunwind <https://github.com/trungnt2910/haiku/tree/dev/trungnt2910/libunwind>")
};

pkg.Replaces = new List<string>()
{
    "lib:libgcc_s",
    "lib:libroot"
};

pkg.DirectoryEntries = new List<HpkgDirectoryEntry>()
{
    new HpkgDirectoryEntry()
    {
        Name = "lib",
        FileType = HpkgFileType.DIRECTORY,
        FileAccessTime = DateTime.Now,
        FileCreationTime = DateTime.Now,
        FileModifiedTime = DateTime.Now,
        Children = new List<HpkgDirectoryEntry>()
        {
            new HpkgDirectoryEntry()
            {
                Name = libroot,
                FileType = HpkgFileType.FILE,
                FileAccessTime = File.GetLastAccessTime(libroot),
                FileCreationTime = File.GetCreationTime(libroot),
                FileModifiedTime = File.GetLastWriteTime(libroot),
                Data = ByteSource.Wrap(File.ReadAllBytes(libroot))
            },
            new HpkgDirectoryEntry()
            {
                Name = libgcc_s,
                FileType = HpkgFileType.FILE,
                FileAccessTime = File.GetLastAccessTime(libgcc_s),
                FileCreationTime = File.GetCreationTime(libgcc_s),
                FileModifiedTime = File.GetLastWriteTime(libgcc_s),
                Data = ByteSource.Wrap(File.ReadAllBytes(libgcc_s))
            },
        }
    }
};
```
The code I used to craft it (Not a recipe, I forgot how to write recipes after 2 years), but it should be easy enough to understand what's inside the package.