these 2 derivations will be built:
  /nix/store/g8k3r68xs0vlp00y34dwrv5dnay341zy-nix-grpc-store-0.2.0.drv
  /nix/store/8k2kc0zld75qnbfabi61vb97fdgsvmyi-nix-grpc-store-exit-stress.drv