How about doing away with the build system entirely? Build systems seem like something that shouldn't exist. When I create a new C# .NET app in Visual Studio 2019, what "build system" does it use? You might have an academic answer, but that's beside the point. It doesn't matter. It just builds. Optimizing a build system feels like a lack of vision, and getting stuck in a local maxima where you think you're being more productive, but you're not seeing the bigger picture of what could be possible.