$ dune build
Fatal error: exception Ctypes_static.IncompleteType
-> required by _build/default/src/libpari__c_cout_generated_types.c
-> required by _build/default/src/libpari__c_cout_generated_types.exe
-> required by _build/default/src/libpari__c_generated_types.ml
-> required by
   _build/default/src/.parilib.objs/native/parilib__Libpari__c_generated_types.cmx
-> required by _build/default/src/parilib.cmxa
-> required by _build/default/src/test.exe