Building a file system for multiple architectures

In an approach to building a file system for multiple architectures, responsive to receiving a manifest for a file system build, a base layer is retrieved for each platform to be built, where the base layer is an operating system base. Responsive to determining that any layer to be built has not been built, the next layer to be built is retrieved. Responsive to the next layer to be built is platform-independent, the next layer is retrieved from a cache, where the next layer supports each platform. Responsive to the next layer to be built is platform-dependent, the next layer is built, where a copy of the next layer is built for each platform. The above steps are iteratively repeated until each layer is built. A single image of a completed file system build is stored, where the single image supports each platform.