establish installed dependency not in portfile

[Craig Treleaven]

> On Oct 9, 2017, at 10:00 AM, Rainer Müller <raimue at macports.org> wrote:
> 
> On 2017-10-09 15:21, db wrote:
>> On 09/10/17 14:05, Chris Jones wrote:
>>> There will be a lot more than 3K ports now, Ryan's message was a while back. Give it a week or so and pretty much it will have caught up with the others, I suspect.
>> 
>> There are still no binaries for all ports for the previous supported OS releases, i.e., 10.11 and 10.12.
> 
> Due to license conflicts, we cannot distribute binaries for all ports.
> 
Also, there are no binaries for ports that depends on non-default variants.  

Craig