these 3 derivations will be built:
  /nix/store/7bzv8k19c38y5x4n0zlap5dxs9y2wihi-vendor-cargo-deps.drv
  /nix/store/z32h09b4annr8xybzs7pf8yy4p5x49zh-iets-deps-riscv64-unknown-linux-gnu-0.1.0.drv
  /nix/store/ys6vbc85mqcy782lalvvzr45xwgwrl26-iets-riscv64-unknown-linux-gnu-0.1.0.drv