Running a parametrized build with Copy Artifact's Build Selector breaks Ant functionality on Windows

I have a Hudson job where the build needs to be parametrized. One of the required parameters for the build is the version of an artifact from another build. For this, I use "Build selector for Copy Artifact" as one of the user parameters for a build. The problem is that this causes an un-escaped xml tag to be passed in as an environment variable to an Ant build task.

For example, we have a Copy Artifact parameter by the name "build_selector". The ant target is "test". The ant build task then executes the following: cmd.exe /C '"ant.bat -file build.xml -Dbuild_selector=<StatusBuildSelector/> test && exit %%ERRORLEVEL%%"'. This results in an error message "The system cannot find the file specified.". This is occurring on my Hudson slave running Windows Server 2003 x64. Please let me know if I can provide any additional information in getting this issue resolved. Thank you.