these 2 derivations will be built:
  /nix/store/8b0gg67cy66hp07rgx0a0qfw7ya6m8i5-nix-grpc-store-0.2.3.drv
  /nix/store/7s2zsrdsgjki6n15mgfqxd6y7j9afn34-nix-grpc-store-exit-stress.drv