dyncall uses LoadLibrary, which does not support injection of a search path for dependent libraries.

JNA uses LoadLibraryEx with the LOAD_WITH_ALTERED_SEARCH_PATH option (see MSDN).

Workaround is to load the dependencies first or to declare them with @Library("MyLib", dependencies = { "MyDep1", "MyDep2" ... })

(issue reported in this discussion on the mailing-list)