Dune fails to compile my library with pyml

So I was trying to use pyml in my project GitHub - thierry-martinez/pyml: OCaml bindings for Python

and it turns out that just adding pyml to dune libraries makes my project crash on linking with :

/usr/bin/ld: cannot find -lposixat_stubs
/usr/bin/ld: cannot find -lshexp_bigstring_io_stubs
/usr/bin/ld: cannot find -lshexp_bigstring_stubs
/usr/bin/ld: cannot find -lbase_stubs
/usr/bin/ld: cannot find -lbase_internalhash_types_stubs
/usr/bin/ld: cannot find -lspawn_stubs
/usr/bin/ld: cannot find -lnumpy_stubs
/usr/bin/ld: cannot find -lpyml_stubs
/usr/bin/ld: cannot find -lstdcompat__stubs

Curiously, it only happens on my real life project - here is the dune file

(executable    
 (name main)    
 (public_name mm_bench)    
 (modes byte native)    
 (libraries batteries  pyml streaming shexp.process tensor_loops re ppx_deriving)    
 (preprocess (pps ppx_deriving.show ppx_deriving.ord ppx_deriving.eq    
 ppx_deriving.ord ))    
 (package mm_bench)    
)    

Because when I try to use pyml in a toy project it runs perfectly (the toy project being the one described in pyml README). So I am not sure it is even a bug specific to pyml.

I may fill an issue on pyml github but I first wanted to know if anyone has ever encountered a linking bug in dune and what are the probable causes. There is a chance that the issue arises from trying to link with C stubs. I’m trying to reproduce a minimal error configuration but it’s difficult. The problem arises with both ocaml 4.12 and ocaml 4.10. Any help would be appreciated.

Thanks !

EDIT : Ok, found it, pyml fails to compile in byte mode. I will fill an issue on github.

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