From:

https://github.com/d-gamedev-team/opengl-tutorials/blob/master/ports/opengl-tutorial.org/dub.json

Building this I get:
Error executing command run: Main package must have a binary target type, not none. Cannot build.

This is just a package that contains subpackages, where each subpackage is an executable target type. If the user tries to build the main package, it should simply build all the subpackages. The above used to work about 8 months ago, and the first subpackage example on the docs site also has targetType set to none: http://code.dlang.org/package-format

What should I use instead?

Side-note: What's up with this text box growing vertically disproportionately to the amount of text I'm typing? It's moving the reply button 10 scrolls down. Funny feature..