this derivation will be built:
  /nix/store/swxy8vmlv1qaf7a0qkqcgl6ky2xj48cl-inputDerivation-effect-docs-pages.drv
building '/nix/store/swxy8vmlv1qaf7a0qkqcgl6ky2xj48cl-inputDerivation-effect-docs-pages.drv'...