this derivation will be built:
  /nix/store/4bq7m8g6izmg66ilikbczzd5yq0fc627-inputDerivation-effect-docs-pages.drv
building '/nix/store/4bq7m8g6izmg66ilikbczzd5yq0fc627-inputDerivation-effect-docs-pages.drv'...