these 2 derivations will be built:
  /nix/store/0jaaz883wf7x2w0prl1ywvvmpmz5ykkz-nix-grpc-store-0.2.3.drv
  /nix/store/l52lhcfl2igdnqhvx515gghrpkix0ry6-nix-grpc-store-exit-stress.drv