these 2 derivations will be built:
  /nix/store/f18h2ray8sd1pp3ww5n37ck6n67jkpfp-nix-grpc-store-0.2.3.drv
  /nix/store/7apb1kkls3nsqm5i3n01jm9n4cf5yymp-nix-grpc-store-dispatcher.drv