these 2 derivations will be built:
  /nix/store/h7fclqq0arb85gjv5h1cmikigpy16afx-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/mn6c740zmya3mx4yxq3ccrcjkk89crkn-nix-grpc-store-exit-stress.drv