Strange compilation problem

[Matthieu Dubuget <matthieu.dubuget@gmail.com>]

This command line fails during the linking stage:

> ocamlfind opt -linkpkg -package miniscan test.ml -o test.exe
> ** Fatal error: Cannot find file "libmingw32"
> File "caml_startup", line 1, characters 0-1:
> Error: Error during linking

Since this seems to be a problem with my "miniscan" findlib package,
I gather some information and by-pass it

> $ ocamlfind query miniscan
> C:/cygwin/home/matt/ocamlmgw/lib/site-lib/miniscan
 
> $ cat C:/cygwin/home/matt/ocamlmgw/lib/site-lib/miniscan/META
> description = "Binding Miniscan"
> archive(byte) = "miniscan.cma"
> archive(native) = "miniscan.cmxa"
> requires = "mtsvrac,ojson,log,dsn153,okenveloppe,traite"

and this command line works, and produces a working test.exe file:

> ocamlfind opt -linkpkg -package
mtsvrac,ojson,log,dsn153,okenveloppe,traite -I
c:/cygwin/home/matt/ocamlmgw/lib/site-lib/miniscan miniscan.cmxa test.ml
-o test.exe

Any idea what the problem could be? Or what I should check next?

Salutations

Matt