these 2 derivations will be built:
  /nix/store/sghc44k83fiib4yj88zq9wfkq4f59a0g-nix-grpc-store-0.2.3.drv
  /nix/store/27spshvwkbcd708v6mpjg1vrkrf8l01x-nix-grpc-store-dispatcher.drv