Bootstrappable builds
Compilers are often written in the language they are compiling. This creates a chicken-and-egg problem that leads users and distributors to rely on opaque, pre-built binaries of those compilers that they use to build newer versions of the compiler.
To gain trust in our computing platforms, we need to be able to tell how each part was produced from source. We believe that opaque binaries are a threat to user security and user freedom since they are not auditable; we believe the amount of bootstrap binaries should be minimized.
Well, it holds also for Eiffel