these 2 derivations will be built:
  /nix/store/ywxzch8y2y0frfpm1rmjcxlhn28apfbq-nix-grpc-store-0.2.3.drv
  /nix/store/s4lfsscjlwn7kjsmv30rng4pixg7v1ii-nix-grpc-store-exit-stress.drv