Merge pull request #287449 from fricklerhandwerk/add-nix-docs-link

        example = "--max-freed $((64 * 1024**3))";

        type = lib.types.singleLineStr;

        description = lib.mdDoc ''

          Options given to {file}`nix-collect-garbage` when the

          garbage collector is run automatically.

          Options given to [`nix-collect-garbage`](https://nixos.org/manual/nix/stable/command-ref/nix-collect-garbage) when the garbage collector is run automatically.

        '';

      };