Use both prefixes (not conflicting)

buildout.cfg

@@ -15,8 +15,8 @@ develop = src/xbob.extension
 ; options for xbob.buildout extension
 debug = true
 verbose = true
-;prefixes = /Users/andre/work/bob/b/dbg/
 prefixes = /idiap/group/torch5spro/nightlies/last/bob/linux-x86_64-release
+           /Users/andre/work/bob/b/dbg/
 
 [sources]
 xbob.extension = git git@github.com:bioidiap/xbob.extension branch=prototype