this derivation will be built:
  /nix/store/a8ymqlv6b3xvmbvrzwlxh97v8qvkbaqs-inputDerivation-effect-docs.drv
building '/nix/store/a8ymqlv6b3xvmbvrzwlxh97v8qvkbaqs-inputDerivation-effect-docs.drv'...