this derivation will be built:
  /nix/store/i0l7570zayghz9zxjmyvpj2f3sdc5h3q-inputDerivation-effect-docs-pages.drv
building '/nix/store/i0l7570zayghz9zxjmyvpj2f3sdc5h3q-inputDerivation-effect-docs-pages.drv'...