this derivation will be built:
  /nix/store/9p96l4qm4n4q7risv7b8b9nzslz0gx9l-inputDerivation-effect-docs-pages.drv
building '/nix/store/9p96l4qm4n4q7risv7b8b9nzslz0gx9l-inputDerivation-effect-docs-pages.drv'...