building custom package

[Christian <christian.rivasseau@gmail.com>]

Hi,

I am trying to build a custom zenoss package (http://www.zenoss.com/). 
I made a DEBIAN directory which contains control file and pre / post scripts, and the directory
/usr/local/zenoss with all the files. However when trying to install get the following error : 

package control info rmdir of `usr' didn't say not a dir: Directory not empty
Errors were encountered while processing:

anybody know what's that supposed to mean (googled everything)