mxo inside pluggos

Hi !
Is it possible at all to build pluggos containing externals built
with XCode, hence in the .mxo format ? I'm getting a plugbuilder
error whenever I try that.
I already managed to create a runtime application using mxo externals
by manually placing them inside the resulting bundle, but this
workaround can't be applied to VSTs.

Any ideas ? Thanks in advance.

Best,

--
Axel Balley