these 2 derivations will be built:
  /nix/store/m3v70spz2sw443y09277b9f1k81sk5r3-nix-grpc-store-0.2.0.drv
  /nix/store/lqdz00j3czjyblj3pigpz6j9n0bbyzw1-nix-grpc-store-exit-stress.drv