Have just tried rebuilding Tvheadend using the instructions here:
but replacing “aptitude” with “apt-get” and ignoring the first instruction (“… wget”). The build seemed to go OK. I then copied the results into “/usr/bin”, overwriting the existing “tvheadend” file, and rebooted. The new build is recognised in the title of the x.x…x.x:9981 web page, but none of the tabs appear so there is something else that needs doing.