We practically need libgen-crystal to use this anyway, so just link zstd to libgen-crystal and now it's available. * Also, this consideration did not prevent t

We practically need libgen-crystal to use this anyway, so just link zstd to libgen-crystal and now it's available. * Also, this consideration did not prevent trying .tar.xz. I don't imagine .tar.xz is that much more available than .zstd.