this derivation will be built:
  /nix/store/6jji1aw6g3m9vlq9z65hgasmq4g03nzq-inputDerivation-effect-docs-pages.drv
building '/nix/store/6jji1aw6g3m9vlq9z65hgasmq4g03nzq-inputDerivation-effect-docs-pages.drv'...