these 2 derivations will be built:
  /nix/store/3awgfk5qakzlwadv77yjabgp2bbfw5cy-nix-grpc-store-0.2.1.drv
  /nix/store/6l7bfs24r5harf48zjd77ls3vjxs4pzi-nix-grpc-store-exit-stress.drv