these 2 derivations will be built:
  /nix/store/b70bz28c6cbrrcnl8fzxrbgnhr4v34f9-nix-grpc-store-0.2.2.drv
  /nix/store/0j8cgyl9p5820hx44hng1jjlirlsn4fj-nix-grpc-store-exit-stress.drv