these 2 derivations will be built:
  /nix/store/m202pbh0r3cw2h3a8qa789z5zz4zk6lz-nix-grpc-store-0.2.3.drv
  /nix/store/f1k282snjiq8krxkd0jg8kp37p3glk6q-nix-grpc-store-exit-stress.drv