these 2 derivations will be built:
  /nix/store/bgdddrzypb9cksf7rk1p9qa5ly39cipb-nix-grpc-store-0.2.3.drv
  /nix/store/7nmsa45by8ajyrzwyv9n66h6xaqm0nf5-nix-grpc-store-dispatcher.drv