Fixing derivation crash: metadata come as a string
This fixes my misunderstanding with the metadata, that they can be interpreted in a variety of ways automatically. Instead, this value needs to be interpreted as a string. Since it's set in python, it's guaranteed to have the value True or False (with that capitalization), so this update should solve the problem related to access.
Tagging @boeriu , as this will already cause some issues tomorrow... Sorry for the trouble!