these 2 derivations will be built:
  /nix/store/xm494mrc25vdgqcqvach2r9vslggxa2g-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/5k1wic35ynp26bmyazp5gv5y7kgfpfhr-nix-grpc-store-exit-stress.drv