==> Making package: nvidia-96xx 96.43.13-2 i686 (Mon Oct 19 02:45:39 BST 2009)
==> Checking Runtime Dependencies...
==> Checking Buildtime Dependencies...
==> Retrieving Sources...
  -> Found NVIDIA-Linux-x86-96.43.13-pkg1.run in build dir
==> Validating source files with md5sums...
    NVIDIA-Linux-x86-96.43.13-pkg1.run ... Passed
==> Extracting Sources...
==> Removing existing pkg/ directory...
==> Entering fakeroot environment...
==> Starting build()...
Creating directory NVIDIA-Linux-x86-96.43.13-pkg1
Verifying archive integrity... OK
Uncompressing NVIDIA Accelerated Graphics Driver for Linux-x86 96.43.13 
[lots of dots, snipsnip]
The kernel you are installing for is a Xen kernel!

The NVIDIA driver does not currently work on Xen kernels. If 
you are using a stock distribution kernel, please install 
a variant of this kernel without Xen support; if this is a 
custom kernel, please install a standard Linux kernel.  Then 
try installing the NVIDIA kernel module again.

*** Failed Xen sanity check. Bailing out! ***

make[1]: *** [build-sanity-checks] Error 1
make: *** [module] Error 2
==> ERROR: Build Failed.
    Aborting...