Sonarr.tv master InRelease' doesn't support architecture 'arm64'

I can verify that a manual install from the tar.gz works well on the Pine64. Steps are below if it helps anyone else.

  1. Get the tar.gz:
    wget http://update.sonarr.tv/v2/master/mono/NzbDrone.master.tar.gz
  2. Install sonarr dependencies:
    sudo apt-get install mono-complete mediainfo sqlite3
  3. Move and extract the tar.gz:
    sudo mv NzbDrone.master.tar.gz /opt/
    sudo tar xzvf NzbDrone.master.tar.gz
  4. Start the server:
    cd NzbDrone/
    mono --debug NzbDrone.exe