these 2 derivations will be built:
  /nix/store/q5wv541yw9227ssq2r772f82j1q61vpb-nix-grpc-store-0.1.0.drv
  /nix/store/y4xai1lz67hyihcg0bppp2d47fyfz15j-nix-grpc-store-exit-stress.drv