Originally Posted by Squpix
Had the same issue and did
That fixed the errors and I could build the update-cm-6.1.0-RC0-GalaxyS-signed.zip
(used make otapackage). But I'm really not sure if that's the right way.
But when I copied the update.zip to sdcard and applied update.zip with cwm it starts to copy but the process is too fast (the update.zip size is ~90MB). The next boot start just the old system.
Well seems that I have to wait for a release or read more documentation...
DON'T BUILD OTAPACKAGE!
Just do steps from OP. Don't change anything!