MsBuild Issue - multiple copybook paths

In our environment, we have two separate folders for copybooks.

We are trying to specify these two copybook paths in the MsBuild .RSP file with some variation of the following statement:

/p:MFDependencyPaths=L:\URISYS\COMPCOPY

The above only shows one of the paths.  When we try this (folder paths separarted by a semi-colon):

/p:MFDependencyPaths=L:\URISYS\COMPCOPY; L:\URISYS\STATECPY 

or when we try this (two statements):

/p:MFDependencyPaths=L:\URISYS\COMPCOPY; L:\URISYS\STATECPY 

/p:MFDependencyPaths=L:\URISYS\STATECPY 

... we get various errors.

How do you specify multiple copybook paths in the .RSP file for MsBuild ???

Thanks