The idea with this is that things like yum should be able to look for
it and determine whether or not they should assume that they can
change things on the system.
https://bugzilla.gnome.org/show_bug.cgi?id=725380
OSTree is a tool for managing bootable, immutable, versioned
filesystem trees. While it takes over some of the roles of tradtional
"package managers" like dpkg and rpm, it is not a package system; nor
is it a tool for managing full disk images. Instead, it sits between
those levels, offering a blend of the advantages (and disadvantages)
of both.