PostGIS breakage on libgdal in Ubuntu

Folks,

Currently apt.postgresql.org ships a postgresql-9.4-postgis-2.1 which
depends on a libgdal1 which you also ship.  However, this libgdal1 will
not install on Ubuntu Trusty because it is incompatible with the
supporting geo libraries it needs.

Is there a reason why the pgdg postgis doesn't just depend on the
libgdal1h which ships with Ubuntu?  That would fix the issue neatly.  As
it is, it's not possible to install PostGIS+9.4 using pgdg packages on
Ubuntu.

Is this something which is different on Debian vs. Ubuntu, and that's
the reason for the breakage?

--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com