x11/yelp gtk 2 gecko build... configure: error

[AN]

FreeBSD FBSD10 10.0-CURRENT FreeBSD 10.0-CURRENT #19 r240241: Sat Sep  8 
15:52:03 EDT 2012     root at FBSD10:/usr/obj/usr/src/sys/MYKERNEL  amd64


checking manual gecko home set... checking for compiler -fshort-wchar 
option... yes
checking whether to enable C++ RTTI... no
checking whether we have a gtk 2 gecko build... configure: error: This 
program needs a gtk 2 gecko build
===>  Script "configure" failed unexpectedly.


Full log:
http://sebsauvage.net/paste/?5ffb3f118aa2d8f9#Rn19ugCsZwvW6o5rsj0BQXTfXScQvSkaUMQkdB3VVC0=