Installing R 3.4.2 from ports doesn't find cairo.so lib

[Victor]

Under

FreeBSD metbsd 11.1-RELEASE-p1 FreeBSD 11.1-RELEASE-p1 #0: Wed Aug  9 11:17:49 UTC 2017    
root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  i386

I'm trying to install the new R 3.4.2 version from ports (/usr/ports/math/R) but when I issue


make install
..............
..............
===>  Checking if R already installed
===>   Registering installation for R-3.4.2
pkg-static: Unable to access file /usr/ports/math/R/work/stage/usr/local/lib/R/library/grDevices/libs/cairo.so:No such file or directory
*** Error code 74

Stop.
make[1]: stopped in /usr/ports/math/R
*** Error code 1

Stop.
make: stopped in /usr/ports/math/R

Can someone out there help me to fix the problem?

Ciao
Vittorio