these 2 derivations will be built:
  /nix/store/7656mfgkaqrixg1gchfki199rnjqgd8p-nix-grpc-store-0.1.0.drv
  /nix/store/haqyjmafwly4cm74bq6fkymgn5f6x3sx-nix-grpc-store-exit-stress.drv