these 2 derivations will be built:
  /nix/store/ckx2d9qiiyny58bi3bpm9fixny7wb5jc-nix-grpc-store-0.2.3.drv
  /nix/store/frmwfjn7smd1n6z1blfc7ngm3hz79qkx-nix-grpc-store-dispatcher.drv