this derivation will be built:
  /nix/store/h3b17ny3xjdrvqcklbxp4amiiafwdyns-inputDerivation-effect-docs-pages.drv
building '/nix/store/h3b17ny3xjdrvqcklbxp4amiiafwdyns-inputDerivation-effect-docs-pages.drv'...