De sua FAQ geral:
Can I use a version newer than the one in the Book?
If this is your first time building LFS, using a version not in the book or varying from the book in any way is not a good idea. The IRC channel regulars have a saying, "FBBG", meaning "Follow Book, Book Good." They and the people on the lists have helped many an unhappy newbie who deviated from the book during that first build.
Once you've built a system "by the book", you have a stable knowledge base from which to experiment to your heart's content (or pain, as is often the case.)
Eu acho que eles dizem isso por um motivo.