these 2 derivations will be built:
  /nix/store/6xrjc88x9xnbnmb0c54cxigwi02l4scr-nix-grpc-store-0.2.3.drv
  /nix/store/4snig95i9rvywrnn8idy1mvbjgcnrjl7-nix-grpc-store-exit-stress.drv