these 2 derivations will be built:
  /nix/store/pd1p1ss6cz701nzgyg7phkjwbhs7408g-nix-grpc-store-0.2.2.drv
  /nix/store/hwbnimzi5m3g4h8wk2b2x652pk81c48r-nix-grpc-store-exit-stress.drv