these 2 derivations will be built:
  /nix/store/zsy55k31i9l1kkfrk2hmp68jvhd9zzhb-nix-grpc-store-0.1.0-beta.1.drv
  /nix/store/2ynsgayl377qg99v59zcr56k0lgl7z40-nix-grpc-store-exit-stress.drv