these 2 derivations will be built:
  /nix/store/b55iik0hlr34j6a9j07c552lyqln9jfd-nix-grpc-store-0.2.2.drv
  /nix/store/0l69yrp4m4mbx16xz61rank23mh64vs2-nix-grpc-store-exit-stress.drv