these 2 derivations will be built:
  /nix/store/2y1m80xjp1nn7lcxl872imjdal87mxyh-nix-grpc-store-0.1.0-beta.3.drv
  /nix/store/0l14mwc4wlpfjnbrcfm758injbjdpz7j-nix-grpc-store-dispatcher.drv