broken build www/webkit-gtk2: missing headers

[green dog]

After an upgrade gnutls www/webkit-gtk2 doesn't gather with an error
libsoup/soup.h not found.

The reason of it it is possible in it:

$ pkg-config --cflags libsoup-2.4
gnome-config: not found
Package zlib was not found in the pkg-config search path.
Perhaps you should add the directory containing `zlib.pc'
to the PKG_CONFIG_PATH environment variable
Package 'zlib', required by 'GnuTLS', not found

$ grep zlib /usr/local/libdata/pkgconfig/gnutls.pc
Requires.private: zlib

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uname -a

FreeBSD localhost.my.domain 8.2-RELEASE FreeBSD 8.2-RELEASE #0: Fri Feb 18
02:24:46 UTC 2011 root at almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC
i386