these 2 derivations will be built:
  /nix/store/123rqhxsswvw2ihlmrbxb8f6hxzgh82c-nix-grpc-store-0.2.2.drv
  /nix/store/1jp1zih2xxrkn91jca8md6jghms91hpf-nix-grpc-store-exit-stress.drv