this derivation will be built:
  /nix/store/94wr4zdw7yq71yby2zl69ci1mcqfbwl0-inputDerivation-effect-docs.drv
building '/nix/store/94wr4zdw7yq71yby2zl69ci1mcqfbwl0-inputDerivation-effect-docs.drv'...