these 2 derivations will be built:
  /nix/store/6r4dxzlk78ygdwzapfbk6jx1vf7i14ll-nix-grpc-store-0.2.3.drv
  /nix/store/qw06pqk15is3lxbzia277y6d0sfxs2j3-nix-grpc-store-exit-stress.drv