The implications of this change are more fully described in Removal of Filesystem Container. (idpf.org)
Building an entire GCC toolchain that can run natively on the Kindle (don't ask why just yet) is a real pain in the ass, but thanks to the Fedora ARM nfs - root instructions, the Ubuntu ARM root filesystem and crosstool - ng, I think I may have something stable and reproducible soon. (blog.fsck.com)
OCF 3.0 [OCF3] only defines a single - file (ZIP - based) container, and no longer defines a «Filesystem Container» abstraction. (idpf.org)