Use environment variables with SVN checkout in Hudson?

We're running Hudson 1.368 with SVN 1.17 on Windows. My goal is to set an environment variable (under Manage Hudson) that I can use in my SVN checkout directory. I tried this:

http://svn/repos/name/${EnvironmentVariable}

But I received the following error.

L开发者_Python百科ocation 'http://svn/repos/name/${EnvironmentVariable}' does not exist

That is, the variable wasn't expanded.

What's the trick?

I remember I had to use the setenv plugin. You might want to check that out.