these 2 derivations will be built:
  /nix/store/ppxhgdmcj3mkny258rxg2lcpg6fkz41h-nix-grpc-store-0.1.0.drv
  /nix/store/qk407yfppsyfaz59l7bsbh8xifbwprmk-nix-grpc-store-exit-stress.drv