I am following a procedure on freeBSD wiki to install Guest Additions in freeBSD.
pkg install emulators/virtualbox-ose-additions
I was able to install emulators/virtualbox-ose-additions without any errors. After this I ran this command:
# cd /usr/ports/emulators/virtualbox-ose-additions && make install clean
and got this error:
vboxmouse_drv_117.so : No such file or directory *** Error code 71
More details in image below: