these 2 derivations will be built:
  /nix/store/acyjag6qwid6dq8knknjykmvhq001k0r-nix-grpc-store-0.1.0.drv
  /nix/store/1iixhrg5hrvyr0fsxjgrrsmwv7md2l1b-nix-grpc-store-exit-stress.drv