these 2 derivations will be built:
  /nix/store/10g15011xr9gppmrqfih3ckvhmqp6aqv-nix-grpc-store-0.1.0.drv
  /nix/store/p6wninvx29nca9csk6m26m9azdlbfm95-nix-grpc-store-exit-stress.drv