Wrong question; they're working on different levels of abstraction. Ninja is designed to be a very fast and lightweight tool for doing work based on a dependen

Wrong question; they're working on different levels of abstraction. Ninja is designed to be a very fast and lightweight tool for doing work based on a dependency graph: actually knowing how to build anything on its own is an explicit non-goal. Premake, on the other hand is a full-blown build system that can make decisions and knows about how to perform specific code-related tasks, and can then generate rules for other tools to follow. Unless I'm mistaken, Premake could hypothetically output a build.ninja file.