these 2 derivations will be built:
  /nix/store/m9r2dmdwsi7zsm205l1df1vvkqlibfjw-nix-grpc-store-0.2.3.drv
  /nix/store/zygqm3mms1b26k6yqxgwff8mld3kazsg-nix-grpc-store-dispatcher.drv