https://bugs.winehq.org/show_bug.cgi?id=37751
--- Comment #13 from Vincent Povirk madewokherd@gmail.com --- I'm wrong again. The only place I see the library's path in logs is Mono: Config attempting to parse: 'C:\windows\Temp{CE63C0A7-F186-42D6-AB03-6524056A10F2}.ba\BootstrapperCore.config'.
It seems this config file is set using IAppDomainSetup.set_ConfigurationFile.
The application also calls set_ApplicationBase, maybe the path is set there.