these 2 derivations will be built:
  /nix/store/38m8xpd43yaf8ka6c5zc390q2ax8qjfs-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/8vnk160bdia9vkhssma50dl1pc4rw78k-nix-grpc-store-exit-stress.drv