xmonad-contrib seems to have been removed from ports and packages along with a lot of other haskell stuff
I wondered why xmonad wouldnt start after upgrading,
then i realized it was because xmonad-contrib had gone walkabout
I came across this thread and this caught my eye
"Ports for Haskell...
I recently switched from dwm to xmonad
and made a few videos about setting up xmonad on freebsd