these 2 derivations will be built:
  /nix/store/5d3b9cd57r5d8c2cmdnvq1b46f5jr2j3-nix-grpc-store-0.2.3.drv
  /nix/store/4yi3lzpj9dnpm7krrqzcn7579i3li2mp-nix-grpc-store-dispatcher.drv