this derivation will be built:
  /nix/store/96wwkvp87gj3b8pwbd35pdjfbg8zqqmn-inputDerivation-effect-docs-pages.drv
building '/nix/store/96wwkvp87gj3b8pwbd35pdjfbg8zqqmn-inputDerivation-effect-docs-pages.drv'...