these 2 derivations will be built:
  /nix/store/05vkrm1nm99b7hfqshdjw0qhh5y2xba1-nix-grpc-store-0.2.2.drv
  /nix/store/hbz9pjzvlx1i66v6j5qxr51dcpqx5j8m-nix-grpc-store-dispatcher.drv