Environemental variables not working

I was trying uses cleaner, and i had an error, the problem was that CnPack doesn't use the environemental variables, I had this in my library path

$(DXVCL)\ExpressScheduler 3\Sources

I replaced with this and after that it workes:

C:\Program Files\Developer Express.VCL\ExpressScheduler 3\Sources

May be this is a known problem, anyway I report.