The way to define options is interesting. It's hard to see the benefits from the docs in the README tho, given that it's yet another syntax to learn. I suggest

The way to define options is interesting. It's hard to see the benefits from the docs in the README tho, given that it's yet another syntax to learn. I suggest to add a complete example of common use cases like running the unit tests, building targets while setting the correct options depending on the host (linux vs windows vs macos).