this derivation will be built:
  /nix/store/4kv0bc04xrkbh8s4z8nhd8si5qsll8i0-inputDerivation-effect-docs-pages.drv
building '/nix/store/4kv0bc04xrkbh8s4z8nhd8si5qsll8i0-inputDerivation-effect-docs-pages.drv'...