PCBSD9.1 - NVIDIA driver error

Hi all, I have tried to install NVIDIA driver but after ‘make install’ I got this error:
===> src (install)
@ -> /usr/src/sys
machine -> /usr/src/sys/amd64/include
cd: /sys/x86/include: No such file or directory
*** [x86] Error code 2

Stop in /usr/home/minda/Downloads/NVIDIA-FreeBSD-x86_64-310.19/src.
*** [realinstall] Error code 1

Stop in /usr/home/minda/Downloads/NVIDIA-FreeBSD-x86_64-310.19.

I am using 64bit PCBSD, NVIDIA GTX550Ti, Fetched System Source and Ports Tree, ZFS filesystem:

/
/dev
/proc
/compat/linux/proc
/root
/tmp
/usr/home
/usr/jails
/usr/obj
/usr/pbi
/usr/ports
/usr/ports/distfiles
/usr/src
/var/audit
/var/log
/var/tmp
/usr/home/minda

UPDATE: I’ve tried to create simlink x86 to amd64 in /usr/src/sys/ but I got this error:

===> src (install)
x86 -> /usr/src/sys/amd64/include
awk -f @/tools/makeobjops.awk @/kern/device_if.m -h
awk -f @/tools/makeobjops.awk @/kern/bus_if.m -h
make: don’t know how to make @/dev/pci/pci_if.m. Stop
*** [realinstall] Error code 2

Stop in /usr/home/minda/Downloads/NVIDIA-FreeBSD-x86_64-310.19.

Any advice appreciated.

BR

Minda