this derivation will be built:
  /nix/store/kldzcmxbd1f5gvcflhmvzl9m5vaj7qlh-inputDerivation-effect-docs.drv
building '/nix/store/kldzcmxbd1f5gvcflhmvzl9m5vaj7qlh-inputDerivation-effect-docs.drv'...