I'm looking for a word which I've seen used most often when describing works of music, art or literature. I thought the word was "diminutive" but that appears to be incorrect.
I am not looking for a word which describes something based on a prototype (which has already been asked here).
Instead, I am looking for the word which describes, somewhat pejoratively, something which borrows elements from a predecessor or predecessors that were not intended to be prototypes.
Here's an example sentence:
The new album from the Ga Ga Dolls is nice to listen to, but terribly _______, since it borrows so many themes from the Blackberries album.
Note: the word I'm looking for is not "plagiarism".