I had 4.1 already installed as a binary through the Launcher.
I got the Required1/2+Optional zips from GitHub as well as the full source again. Unzipped all into Unreal Engine/ top level folder. I also have the cross-compiler already setup from the 4.1 preview.
Once all that’s unpacked, I ran GenerateProjectFiles.bat to get the VS project and then just tried compiling DebugGame for Linux. VS goes to delete all Android files (it claims they are junk) and builds my target without issues.
Once I go back to Editor, I don’t have Android anymore, nor do I get Linux as a packaging option.
Thanks.