these 2 derivations will be built:
  /nix/store/c73kzma31akvb6warxs8k4slbp7iy564-nix-grpc-store-0.2.1.drv
  /nix/store/lx64wjszm4aigk7vh1ax84bkb0zdbkfx-nix-grpc-store-exit-stress.drv