this derivation will be built:
  /nix/store/yg8d373ssjbgp96qa85qxasvx4zcdwzb-inputDerivation-effect-docs-pages.drv
building '/nix/store/yg8d373ssjbgp96qa85qxasvx4zcdwzb-inputDerivation-effect-docs-pages.drv'...