Cannot run process under Windows if working dir. contains parenthesis

The following code creates a script in a sub directory, executes it and redirect outputs to files. It works except if directory contains parenthesis:
``` c++
const auto scriptFile = workspace / "testScript.bat";
std::ofstream ofs(scriptFile.string());
ofs << "echo success" << std::endl;
ofs.close();

const auto outputFile = workspace / "testScriptOut.txt";
const auto errFile = workspace / "testScriptErr.txt";

boost::process::child process(boost::process::detail::windows::build_args(scriptFile.string(), {}),
boost::process::std_out > outputFile,
boost::process::std_err > errFile,
::boost::process::windows::hide);
```
It works in most of cases:
- _dirWithoutSpace_: ok
- _dir with space_ : ok
- _dir(withParen)_ : ko. Error is "'D:\data\Computations\dir' is not recognized as an internal or external command, operable program or batch file."
- _dir WithSpace(andParen)_ : this case is ok! mixing space and parenthesis is well handled
- _dirWithé_ : ok

I've tried different combinations with no success.

The only way I found to make it works is to set the current path:
``` c++
boost::filesystem::current_path(workspace);
boost::process::child process(boost::process::detail::windows::build_args("testScript.bat", {}),
boost::process::std_out > outputFile,
boost::process::std_err > errFile,
::boost::process::windows::hide);

```
Thanks