these 2 derivations will be built:
  /nix/store/5mp8gw0nc4czr067rlxpahp973jbd16x-nix-grpc-store-0.1.0-beta.2.drv
  /nix/store/7c0zakr39nsn88ri9mj54ij0809nr81b-nix-grpc-store-exit-stress.drv