this derivation will be built:
  /nix/store/w5qfy65ah51lasy650idln8gwjy2a9rq-uci-ap.batch.drv
building '/nix/store/w5qfy65ah51lasy650idln8gwjy2a9rq-uci-ap.batch.drv'
uci-ap.batch> structuredAttrs is enabled