these 2 derivations will be built:
  /nix/store/3q4w11ylpnji82lb2836zvkn5hh3jvxm-nix-grpc-store-0.1.0.drv
  /nix/store/scn9bj40cg93gklamj8ihycy5vjql01g-nix-grpc-store-exit-stress.drv