安装完ocaml-4.02.1后，unison安装报错，求解？

UISTYLE = text
Building for Unix
NATIVE = true
THREADS = false
STATIC = false
OSTYPE = linux
OSARCH =
ocamlopt: update.ml ---> update.cmx
ocamlopt -I lwt -I ubase -I system -I system/generic -I lwt/generic -c /soft/unison-2.40.1/update.ml
File "/soft/unison-2.40.1/update.ml", line 1:
Error: The implementation /soft/unison-2.40.1/update.ml

   does not match the interface update.cmi:
   ...
   In module NameMap:
   The value `split' is required but not provided
   In module NameMap:
   The value `choose' is required but not provided
   In module NameMap:
   The value `max_binding' is required but not provided
   In module NameMap:
   The value `min_binding' is required but not provided
   In module NameMap:
   The value `bindings' is required but not provided
   In module NameMap:
   The value `cardinal' is required but not provided
   In module NameMap:
   The value `partition' is required but not provided
   In module NameMap:
   The value `filter' is required but not provided
   In module NameMap:
   The value `exists' is required but not provided
   In module NameMap:
   The value `for_all' is required but not provided
   In module NameMap:
   The value `merge' is required but not provided
   In module NameMap:
   The value `singleton' is required but not provided

make: * [update.cmx] 错误 2