these 2 derivations will be built:
  /nix/store/3hw60b9bj3pq0qcdyd72gbwlqfwzwap4-nix-grpc-store-0.2.3.drv
  /nix/store/zxlid08d4lnn9wak2cn8qfdzzw01fhq0-nix-grpc-store-exit-stress.drv