these 2 derivations will be built:
  /nix/store/c1p5s1n91im27hdnwp4n0gzz6rqgfcfx-nix-grpc-store-0.2.3.drv
  /nix/store/mwk6sgzbd1w28i00gy5fbf270553x3hw-nix-grpc-store-dispatcher.drv