go ports fetching dependencies at build time

[Ryan Schmidt]

Question regarding this commit:

https://github.com/macports/macports-ports/commit/2c8bec5807d23120038f39d292a7e1cad625707d

Here, a port tfmigrate was updated from 0.3.2 to 0.3.3 and changed to allow it to fetch dependencies at build time.

What transpired between 0.3.2 and 0.3.3 that made it necessary to allow the port to do its own fetching again? This seems to happen to various go ports with some frequency. What can we do to improve the situation so that this does not become necessary so often?