these 2 derivations will be built:
  /nix/store/295rk49kmq8drrf9n3jh32r3zsiavlz4-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/s6x6k9jcrg01bisyn0wy2wsmadyzxibr-nix-grpc-store-exit-stress.drv