these 2 derivations will be built:
  /nix/store/i4ml57zqk7zra90q3vgq1ad4mx4n2d8c-nix-grpc-store-0.2.2.drv
  /nix/store/ixsf2vlkmhzzg38jqd4plk9p7lds4y14-nix-grpc-store-dispatcher.drv