ninja: ninja (build system with a focus on speed) ninja: ninja: Ninja is a small build system with a focus on speed. ninja: It differs from other build systems in two major respects: ninja: it is designed to have its input files generated by a higher-level ninja: build system, and it is designed to run builds as fast as possible. ninja: ninja: ninja: ninja: ninja home: http://martine.github.io/ninja ninja: