this derivation will be built:
  /nix/store/xknclx6k62kb5qwv7lkr6bdiw2sr4j1q-inputDerivation-effect-docs.drv
building '/nix/store/xknclx6k62kb5qwv7lkr6bdiw2sr4j1q-inputDerivation-effect-docs.drv'...