i got it working finally using the latest libpd - the plugin is loading and running fine now and i was able to load and run all the sample scripts of the plugin … in case anybody else is playing around with this: this is the diff against the v2-tmp branch Makefile which made it work for me: rack-dockerbuild-v2/patches/VCV-Prototype.patch at main · hexdump0815/rack-dockerbuild-v2 · GitHub
once more thanks a lot and best wishes - hexdump