ppx-sexp-conv 113.33.03-2 is marked for autoremoval from testing on 2017-11-15 It (build-)depends on packages with these RC bugs: 876725: ppx-deriving: ppx-deriving FTBFS with OCaml 4.05.0 877496: sexplib310: sexplib310 FTBFS: Error: This expression has type Obj.t but an expression was expected of type extension_constructor 877507: ppx-core: ppx-core FTBFS: E: Cannot find external tool 'ocamlbuild'