Please add ppx_deriving to portage. https://github.com/whitequark/ppx_deriving deriving is a library simplifying type-driven code generation on OCaml >=4.02. deriving includes a set of useful plugins: show, eq, ord, enum, iter, map, fold, yojson, protobuf. Reproducible: Always
dev-ml/ppx_deriving-3.0 was added yesterday :)