fMRIPrep output + bids-validator

Summary of what happened:

bids validation of fMRIPrep output fails

Command used (and if a helper script was used, a link to the helper script or the command generated):

selected /derivatives/fMRIPrep folder in


bids-validator 1.11.0 in browser firefox 111.0.1
fMRIPrep 22.1.1 (docker)

Environment (Docker, Singularity, custom installation):

Data formatted according to a validatable standard? Please provide the output of the validator:

source data for fMRIPrep has been bids-validated successfully

Relevant log outputs (up to 20 lines):

Screenshots / relevant information:

Hi @crossmanith and welcome to neurostars!

fMRIPrep should outputting a .bidsignore file to account for these files. If not, easy enough to make one yourself. Just a text file with



The BIDS validator does not currently support BIDS derivatives. If you would like to help us test schema-based validation, where derivatives will be implemented, please check out bids-validator/bids-validator/src at master · bids-standard/bids-validator · GitHub. We’re always happy to have more contributors, but I would call this “alpha” software at best, at the moment.

Plus 530 more files not shown in the screen shot :slight_smile: Probably extending bids-validator is the more sustainable way to go…