these 2 derivations will be built:
  /nix/store/772hiymgi7xzyq8gin8kbldhz3vwv9q7-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/plsdlqfld6finbzwz7paavg83r6wpkga-nix-grpc-store-exit-stress.drv