this derivation will be built:
  /nix/store/4ms2aqzf8i0d6zd3fb0rxv2vcr4gbwzm-inputDerivation-effect-docs-pages.drv
building '/nix/store/4ms2aqzf8i0d6zd3fb0rxv2vcr4gbwzm-inputDerivation-effect-docs-pages.drv'...