these 2 derivations will be built:
  /nix/store/lgan0gq0lac9wn59r0w8m0rlykz5d3gm-nix-grpc-store-0.1.0.drv
  /nix/store/nklivfiwm1ys7anlcz1siavgnp0z6f6c-nix-grpc-store-exit-stress.drv