these 2 derivations will be built:
  /nix/store/mpn25630x12c1phlhyvilppzzcs0hn4q-nix-grpc-store-0.1.0.drv
  /nix/store/rmdndg2z72hpjdkzmxc3k60wghvp536b-nix-grpc-store-exit-stress.drv