Error with multiple ppx

Hi
I am trying to replace my usual standard type definition enhancement
combination "with compare, sexp, bin_io" by the ppx equivalent.

When I add [@@deriving compare, sexp], it works perfectly with only
"ppx_compare" and "ppx_sexp_conv" added to my _oasis file.
But, if I add "ppx_bin_prot" to my oasis file, [@@deriving compare] or
[@@deriving compare, sexp] yield this error:
ppx_type_conv: 'compare' is not a supported type type-conv generator.

If I use [@@deriving bin_io], it compiles without any error.

Did I miss something regarding the way those ppx rewriters work ?

Regards,
Johan