these 2 derivations will be built:
  /nix/store/wdxw31arazksznbg4nqc4afkl63mxy31-nix-grpc-store-0.1.0.drv
  /nix/store/j0qx3s7qrhsadwf7qvrqzw7ys0kcgb87-nix-grpc-store-exit-stress.drv