these 2 derivations will be built:
  /nix/store/mphsvsmy9d5m8r0csl2k48al2x1313wf-nix-grpc-store-0.2.3.drv
  /nix/store/vv9r3rc6z33ah11d4hi0yac7if4vkq2d-nix-grpc-store-dispatcher.drv