these 2 derivations will be built:
  /nix/store/fj6kz5ay1y483f3nb2gd517n076r5mjv-nix-grpc-store-0.1.0.drv
  /nix/store/drwdhklm55ki4sk3q8smdciba7pjfwpr-nix-grpc-store-exit-stress.drv