these 2 derivations will be built:
  /nix/store/y28wmlwynci4nn4girbynnwx8arh3kcz-nix-grpc-store-0.2.2.drv
  /nix/store/9l0lxa685q95ysg48b9j9jb9cmsinhbf-nix-grpc-store-dispatcher.drv