these 2 derivations will be built:
  /nix/store/baafzp5g51x493dsw6nq5h9jnhb7043q-nix-grpc-store-0.2.3.drv
  /nix/store/cizacyj043asisv46kgg2s37sw9d3i2n-nix-grpc-store-exit-stress.drv