these 2 derivations will be built:
  /nix/store/7c2fsv18kq2hg2cihxcy4idmda1f6l80-iets-deps-riscv64-unknown-linux-gnu-0.1.0.drv
  /nix/store/96z4yy2vm8b3b1xcma0n4pgd2dfwnz4k-iets-riscv64-unknown-linux-gnu-0.1.0.drv