Reading the title, I thought djb had implemented a build system and I was extremely excited. Still quite interested, but it doesn't have nearly as much allure.
Yes, there's code. I had to choose between linking this or following further down the chain and thought this actually did add something, in that while I could have gone to apenwarr's post directly or linked the the design doc it would have sunk without a trace.
Yes, and I thank you for linking the way you did! I was mostly commenting on djb's reputation for creating extremely robust software, and that it's difficult to refer to this without implying that djb implemented it. However, I'm sure that apenwarr is also an excellent programmer, and as a regular abuser of Make, I'm going to give his redo implementation a shot, especially since djb's design fits my use case much better.