these 2 derivations will be built:
  /nix/store/7ijdkyqlrxdwsjbxq5afncd2n446db5a-nix-grpc-store-0.2.0.drv
  /nix/store/pmwd3ymxdqcqx14hbqz3wzkzsgpr103y-nix-grpc-store-dispatcher.drv