diff --git a/pym/install/variables/system.py b/pym/install/variables/system.py
index fb970eb..70041f5 100644
--- a/pym/install/variables/system.py
+++ b/pym/install/variables/system.py
@@ -725,8 +725,12 @@ class VariableOsNvidiaMask(ReadonlyVariable):
                 chrootPath = image.getDirectory()
             else:
                 chrootPath = self.Get("cl_chroot_path")
-            nvidiaeclass = path.join(chrootPath,
-                                     'usr/portage/eclass/nvidia-driver.eclass')
+            if os.path.isdir(path.join(self.Get('cl_chroot_path'), 'var/db/repos/gentoo')):
+                nvidiaeclass = path.join(chrootPath,
+                                         'var/db/repos/gentoo/eclass/nvidia-driver.eclass')
+            else:
+                nvidiaeclass = path.join(chrootPath,
+                                         'usr/portage/eclass/nvidia-driver.eclass')                
             if not os.access(nvidiaeclass, os.R_OK):
                 return ""
             #TODO investigate