these 2 derivations will be built:
  /nix/store/hsnyi906i2p5crqnjnibplgp3nacfrp8-nix-grpc-store-0.1.0.drv
  /nix/store/3k2rgvnsg9ckfz81hfhns90hmxjips3l-nix-grpc-store-exit-stress.drv