these 2 derivations will be built:
  /nix/store/widwzavxlghz72kvmfr34x3g5q1x3cs2-nix-grpc-store-0.2.0.drv
  /nix/store/g85lxg219417fccgz7r3pwafy9w3xbj5-nix-grpc-store-exit-stress.drv