[Gtk-sharp-list] ./configure [Error]

[Met @ Uber]

I just tried recompiling Gtk# from the .14 release.  I get the following
error even though I have mono/mcs installed from the latest CVS
release.  Any idea how to fix the following problems?  The only option I
passed into Mono, Mcs, and Gtk# was `--prefix=/usr/local`.

====
checking for pkg-config... /usr/bin/pkg-config
checking for mono... Package mono was not found in the pkg-config search
path.
Perhaps you should add the directory containing `mono.pc'
to the PKG_CONFIG_PATH environment variable
No package 'mono' found
 
configure: error: Library requirements (mono) not met; consider
adjusting the PKG_CONFIG_PATH environment variable if your libraries are
in a nonstandard prefix so pkg-config can find them.
===

Thanks in advance,

~ Matthew