pgAdmin4 from apt.postgresql.org

Hi all,

I'm delighted that there's finally a Debian package for pgAdmin4, and 
well done and thanks to the packagers for their hard work.

However, I'm having problems installing it on my Debian Jessie laptop - 
I'm probably doing something silly and would appreciate help:

rod@pegasus:~$ sudo apt-get update

[...lots of stuff...]

rod@pegasus:~$ sudo apt-get install pgadmin4
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package pgadmin4 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 'pgadmin4' has no installation candidate

rod@pegasus:/etc/apt/sources.list.d$ cat /etc/apt/sources.list.d/pgdg.list
# PostgreSQL apt repository.

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


What am I doing wrong?

Thanks,

Ray.

-- 
Raymond O'Donnell :: Galway :: Ireland
rod@iol.ie