Ex. the https://github.com/rkt/rkt/blob/master/Documentation/distributions.md#deb-based link pointed( at the same page) as "you can install manually." don't point anywhere.
I'm especially interested in building for the ARM64( or aarch64) which should be possible as https://github.com/glevand/hikey-coreos#info suggests. Just FYI I'd like to get rkt running in the Ubuntu chroot on ChromeOS.
The page you linked describes how to install from packages. Building from sources is covered in the hacking and quickstart-dev pages.
Great, @lucab which one do you think should be under the "install manually" link on the doc page I linked?
Not sure I got your question. In the distribution page you linked, "manual installation" details installing packages outside of repositories, i.e. that need to be manually fetched and installed (and won't receive automatic updates).
I don't think anything should be fixed there, user documentation should not point to building from sources.
This is already addressed.