Re: postgresql-9.6 updated to version 9.6~beta1-1.pgdg+1

There seems to be an issue with the availability of the 9.6 version of
the "libpq5" package:

root(at)50c6b1f05cad:/# cat /etc/apt/sources.list.d/pgdg.list
deb http://apt.postgresql.org/pub/repos/apt/ jessie-pgdg main 9.6
root(at)50c6b1f05cad:/# apt-get update -qq
root(at)50c6b1f05cad:/# apt-get install postgresql-9.6
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
postgresql-9.6 : Depends: postgresql-client-9.6 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
root(at)50c6b1f05cad:/# # down the rabbit hole we go!
root(at)50c6b1f05cad:/# apt-get install postgresql-client-9.6
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
postgresql-client-9.6 : Depends: libpq5 (>= 9.6~beta1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
root(at)50c6b1f05cad:/# apt-cache show libpq5 | grep Version
Version: 9.5.3-1.pgdg80+1
Version: 9.4.6-0+deb8u1
Version: 9.4.5-0+deb8u1

If we're missing something obvious, pointers would be very much appreciated! I've included "pgsql-pkg-docker(at)postgresql(dot)org" in CC here because this is in the context of getting the "postgres:9.6-beta1" Docker image available. :)

♥,
- Tianon
4096R / B42F 6819 007F 00F8 8E36 4FD4 036A 9C25 BF35 7DD4