@nutritious-monkey-78516 i'm not super familiar with pex or its resolution process but looking in the codebase at pantsbuild/pex for where that error message comes up it seems likely to me that "compatibility" is referring to python interpreter compatibility and not platform compatibility -- and on top of that, i think "compatible" might be a red herring, and it potentially just refers to not being able to find a dependency for some reason. without more info that's as much as i know