this derivation will be built:
  /nix/store/8j6bgzm565qx739yghnp4vn9ihjh2a0x-inputDerivation-effect-docs-pages.drv
building '/nix/store/8j6bgzm565qx739yghnp4vn9ihjh2a0x-inputDerivation-effect-docs-pages.drv'...