[pypy-dev] RPython Environment Variables

I am writing a tool in RPython that needs to access environment variables. Now, all has been going well, but I noticed something interesting. The RPython translator sees os.environ as constant. But, will it still be constant on other platforms? What I'm saying is, are the environment variables permanently embedded into the application? i.e., if I run it on another PC, the values will be the same? Or is there an RLib equivalent? Because I really don't feel like writing a C wrapper... -- Ryan