Path macros not available on eclipse 20 versions

[GeeF]

I have an existing project that was just imported in eclipse 20. When trying to start a debug session I get the ${cross_prefix}gdb${cross_suffix} not found error and if I insert the path directly a follow up error complains about ${jlink_path} / ${jlink_gdbserver}.
This was working fine in eclipse 19. When creating a new project for testing this works as well. I tried manually adding the prefix additionally but it just isn't found within the debug dialogue. Is there a way to fix this or is rebuilding the whole eclipse project the only solution? Or is this more of a CDT related problem?

[ilg-ul]

Any progress on this?