these 2 derivations will be built:
  /nix/store/d4php4vg9z75k1rv1dsifwfrblkrvxvp-nix-grpc-store-0.2.3.drv
  /nix/store/iwvjkjxamgxrciyaj3ry8bwdqa9801bi-nix-grpc-store-dispatcher.drv