I had a fresh install of Ubuntu 18.04.1 and Emacs 26 compiled from source. However I notice somehow the system always installs Emacs 47.0 which is Emacs 25.2.2 from the official Ubuntu repository. This completely destroys my Emacs 26 installation and I have absolutely no idea why this should/could happy, i.e. no warning or reminder. Has anyone else experienced this similar issue? Or could anyone point me to where to start to diagnose the automatic installation occurs? Thanks in advance!