"Even though you have the latest CVS, it is not in the included binaries. You will need to rebuild."
This refers to rebuilding the NSIS compiler (makensis.exe), not rebuilding your script.
If you cannot rebuild the NSIS compiler, you'll need to wait until a new binary version of it is available.
You can check the Changelog (http://nsis.sourceforge.net/development/changelog/
) to see if a new NSIS compiler (makensis.exe) is available.