Building Inkscape - Can I use --enable-osxapp (compiling app bundle)?

Using these instructions
http://wiki.inkscape.org/wiki/index.php/CompilingMacOsX
I'm trying to compile a GTK-native version of Inkscape. I know things are changing, and --enable-osxapp (compiling native app bundles) hasn't been supported, but what is the current status?
The instructions currently say:
"cd packaging/macosx
There edit osx-build.sh to remove the configure option --enable-osxapp because it puts inkscape in a .app bundle where it is started together with X11, which would defeat the purpose of this native compilation. You can also specify an alternative install prefix if you want. Then
./osx-build.sh u a c b i

Is this step still current?
Is it better to use the GTK-Native buildscript provided in
packaging/macosx/native-gtk/build-gtk.sh

and if so, in the next step where it says
export PREFIX=/your/install/prefix
is this /opt/local
?
The native versions of Cairo etc has already been installed via Port as per the build instructions.

Sorry, I have no idea about

Sorry, I have no idea about inkscape, I think you need to check with the inkcape people.