Ok, perhaps I should have said I’m not aware of any Linux package managers that support installing multiple versions of the same package except for Nix which ma

Ok, perhaps I should have said I’m not aware of any Linux package managers that support installing multiple versions of the same package except for Nix which manages it by munging the dynamic library lookup paths at runtime so the binary loads the right versions of its dependencies. Without this, I don’t think it’s possible to (correctly) support multiple versions, and even then the package maintained must take care that multiple versions of the same package don’t wind up in the closure (or the loader will load the first it encounters in the search path).