I use Linux Manjaro, because its package manager allows one to install latest development of sagemath very easily by just clicking a button.
The package manager builds latest development sagematch from sources from AUR (ArchLinux User repository):
https://aur.archlinux.org/packages/sagemath-git/
And it used to be that AUR is updated at same time as a new version of sagemath shows up on this page
http://mirrors-usa.go-parts.com/sage/sagemath/devel/index.html
But now, it has been now more than one week, and AUR is still showing 8.3.rc3, while sagemath is now at sage-8.4.beta0
Any one knows how this process works, and why this time the latest development version does not show on AUR?