Is it possible to install PostgreSQL 9.6 (Beta) on Ubuntu 14.04?

I'm using repository from postgresql.org and trying to get PostgreSQL 9.6 (beta) for Ubuntu. Just in case, the repository is http://apt.postgresql.org/pub/repos/apt/ references at https://www.postgresql.org/download/linux/ubuntu/

deb http://apt.postgresql.org/pub/repos/apt/ trusty-pgdg main
deb http://apt.postgresql.org/pub/repos/apt/ trusty-pgdg-testing main

Running

sudo apt-get install postgresql-9.6

It says

Package postgresql-9.6 is not available, but is referred to by another
package. This may mean that the package is missing, has been
obsoleted, or is only available from another source

E: Package 'postgresql-9.6' has no installation candidate

I also see that postgresql-9.6 was removed from repository here -

05-14 19:08 UTC postgresql-9.6 trusty-pgdg main base DELETED
9.6~beta1-1.pgdg14.04+1

Also here:

WARNING: the "postgresql-9.6" package was deleted from this repository

Is it currently not possible to get postgresql 9.6 using apt-get?