this derivation will be built:
  /nix/store/3539q5ax11j4xxbhvbm6xj41lh74vhg0-seed-age-key.drv
building '/nix/store/3539q5ax11j4xxbhvbm6xj41lh74vhg0-seed-age-key.drv'
seed-age-key> structuredAttrs is enabled

upload niks3: ok