these 2 derivations will be built:
  /nix/store/q50ngwzxpr53dlpi6a08zmjlg0zm76a3-nix-grpc-store-0.2.2.drv
  /nix/store/z7my65gbl4pzmzfjq48l3y5yb91z1i7z-nix-grpc-store-dispatcher.drv