A fast, configurable module system that builds packages from source.
Build using Rust.
Goal: install HPL with OpenMPI and OpenBLAS, all using GCC.
```sh
zpack install hpl %openblas %openmpi +fabrics=auto +lto %%gcc
```
Why? We want `HPL`. `HPL` requires a `BLAS` implementation, which is provided by
OpenBLAS. OpenMPI will act as the compiler for HPL and OpenBLAS, but requires a
base compiler of its own, for which we use GCC.