these 2 derivations will be built:
  /nix/store/lb4ayxzkpq9dzs4h0ksghn5bcah34slz-nix-grpc-store-0.1.0.drv
  /nix/store/6mrr9sg5ninskhydb52c4vynshc6450c-nix-grpc-store-exit-stress.drv