Hi Rob, With 35e8aba I am seeing lots of these warnings: $ PYTHONPATH=. tools/dt-mk-schema -j dtschema/schemas >processed-schema.json /usr/local/google/home/sjg/cosarm/dt-schema/dtschema/schemas/chosen.yaml: duplicate '$id' value 'http://devicetree.org/schemas/chosen.yaml#' ... Am I doing something wrong? Thanks, Simon