these 2 derivations will be built:
  /nix/store/xdci6cxhclvm7nmvgk8aawk3fbj4ahxs-nix-grpc-store-0.1.0.drv
  /nix/store/mmazq6yryn2gb5c2dgka47xcqx6gq1i1-nix-grpc-store-dispatcher.drv