these 2 derivations will be built:
  /nix/store/05vkrm1nm99b7hfqshdjw0qhh5y2xba1-nix-grpc-store-0.2.2.drv
  /nix/store/yn20hj8wsc7ck42ffjmydnyg8wm9p2jn-nix-grpc-store-exit-stress.drv