[unwind]

Cool tool, making building easier seems to trend at the moment. :)

The page ("deps.html") that introduces the .build.conf file says "You can use pkg-config to help find those flags if your system has that installed", but then the actual configuration shown uses only absolute paths.

That threw me off, since it's not at all obvious how or where you can insert calls to external tools (like pkg-config) in the static-looking configuration. I think it'd be a good idea to edit in an example showing pkg-config being used.