these 2 derivations will be built:
  /nix/store/5kkzva7098kim9m6ckh75x4qa1jm5ccg-nix-grpc-store-0.2.2.drv
  /nix/store/zyjh1lsm938vhnzjgcz9i3w1zdllwjfi-nix-grpc-store-dispatcher.drv