Code:
[bengt@freebsd ~]$ sudo portmaster /usr/ports/x11/nvidia-driver
===>>> Port directory: /usr/ports/x11/nvidia-driver
===>>> Gathering distinfo list for installed ports
===>>> Launching 'make checksum' for x11/nvidia-driver in background
===>>> Gathering dependency list for x11/nvidia-driver from ports
===>>> Launching child to install emulators/linux_base-c6
===>>> x11/nvidia-driver >> emulators/linux_base-c6 (1/1)
===>>> Port directory: /usr/ports/emulators/linux_base-c6
===>>> This port is marked IGNORE
===>>> compat.linux.osrelease: 2.6.16 is not supported, please use 2.6.18, BEWARE this is highly experimental
===>>> If you are sure you can build it, remove the
IGNORE line in the Makefile and try again.
===>>> Update for emulators/linux_base-c6 failed
===>>> Aborting update