these 2 derivations will be built:
  /nix/store/xdci6cxhclvm7nmvgk8aawk3fbj4ahxs-nix-grpc-store-0.1.0.drv
  /nix/store/0qx5j4wyapd59ac4xhb1nfz48y9fycaw-nix-grpc-store-exit-stress.drv