these 2 derivations will be built:
  /nix/store/k829hcbvbcwihczvpzmcm3n4m9g0d5qd-nix-grpc-store-0.2.3.drv
  /nix/store/9090x1fk0dqfwcvpj09mfsqg4dysjikw-nix-grpc-store-exit-stress.drv