these 2 derivations will be built:
  /nix/store/rndj5yzkizn1y43r03avx2dy513ivv25-nix-grpc-store-0.2.1.drv
  /nix/store/722l016nr2wr168vmcszly7jlwcalsr3-nix-grpc-store-exit-stress.drv