these 2 derivations will be built:
  /nix/store/7p6kifmy0mmvfb6rx7rscmm4sd4ir0gs-nix-grpc-store-0.1.0.drv
  /nix/store/gvmxs43jyi4xw5pk4qcn7gsd3q8ki4xq-nix-grpc-store-exit-stress.drv