these 2 derivations will be built:
  /nix/store/8b0gg67cy66hp07rgx0a0qfw7ya6m8i5-nix-grpc-store-0.2.3.drv
  /nix/store/jz1nl3pivzhm9n9aqlzj5nd5yzw3d0vq-nix-grpc-store-dispatcher.drv