this derivation will be built:
  /nix/store/jkwysqn9pq27mwj95k0wcz6bi1jf68ak-inputDerivation-effect-docs-pages.drv
building '/nix/store/jkwysqn9pq27mwj95k0wcz6bi1jf68ak-inputDerivation-effect-docs-pages.drv'...