The current order of operations cross build part of the build does not allow properties defined in build-imports to be used in the build-src/platform file.

this may be unavoidable, but should be looked at again

This means we have lines like this:
ti.gfx.sdk=${jfx.root.dir}/import/arm-Graphics-SDK-4_05_00_02/GFX_Linux_SDK/OGLES2/SDKPackage/Builds/OGLES2
crossroots.dir=${jfx.root.dir}/import/CodeSourcery-2009q1a

that need to be updated anytime a tool chain changes which is not the best.