these 2 derivations will be built:
  /nix/store/jd0mj0nqsdh0yvk2732i58y87x3agwp3-nix-grpc-store-0.2.3.drv
  /nix/store/qk1viy7vzj4vfz2mic6cd7z4nm5kf399-nix-grpc-store-exit-stress.drv