these 2 derivations will be built:
  /nix/store/21yqxxrirxgyb8vm5gdz0c4jwzbicx8s-nix-grpc-store-0.2.0.drv
  /nix/store/njx67yravgllrw5s64a4kkmd0lhyikgb-nix-grpc-store-exit-stress.drv