this derivation will be built:
  /nix/store/b46m6jv1bc14mkfi9i9k2pcp8ss8zh8l-inputDerivation-effect-docs-pages.drv
building '/nix/store/b46m6jv1bc14mkfi9i9k2pcp8ss8zh8l-inputDerivation-effect-docs-pages.drv'...