Hi, XZ Utils 5.3.3alpha has been released and one of the highlights is a threaded .xz decompressor. See https://www.mail-archive.com/xz-devel@tukaani.org/msg00591.html Assuming the final stable release by streams happens in December, would there still be time to have dpkg support for it targeting Bookworm? Would it help to have the current alpha version experimental? Is there anything I could help with? Sebastian