err, maybe...
The issue is that there are some ext2 libs from e2fsprogs-1.39 in the base - libcom_err.so.2.1, libe2p.so.2.3, libext2fs.so.2.4, libss.so.2.0 - I'm not sure if there would be a conflict or not with using ext4 apps from, say, e2fsprogs-1.41.9