these 2 derivations will be built:
  /nix/store/vdi0xyqrk5xq8ypnr9r5np3r5mxy0316-nix-grpc-store-0.2.2.drv
  /nix/store/1pkaygpdlixv9p5cd7xxnfd19rzwklr3-nix-grpc-store-exit-stress.drv