these 2 derivations will be built:
  /nix/store/0gq8vbhs15fy4ji5gq9lkzw7rb4dv1cs-nix-grpc-store-0.1.0.drv
  /nix/store/bw4y9z38mvw9z9ah55gcjx877gqc4scn-nix-grpc-store-exit-stress.drv