these 2 derivations will be built:
  /nix/store/0n2z541amarcb1wagf33vv88sv5mibqw-nix-grpc-store-0.2.3.drv
  /nix/store/z7d9zm733h5w4wf64j4424yai2ybg32h-nix-grpc-store-exit-stress.drv