anchor.diff:      "-Dqt5=disabled" # not clear as of writing how to correctly pass in the required qt5 deps
     ] ++ optionals (!gtkSupport) [
       "-Dgtk3=disabled"
  -  ] ++ optionals (!stdenv.isLinux || !enableJack) [
  -    "-Djack=disabled" # unclear whether Jack works on Darwin
  +  ] ++ optionals (!enableJack) [
  +    "-Djack=disabled"
     ] ++ optionals (!stdenv.isLinux) [
       "-Ddv1394=disabled" # Linux only
       "-Doss4=disabled" # Linux only
  
positive.code:     libavc1394
      libiec61883
      libgudev
    ] ++ optionals (stdenv.isLinux && enableJack) [
      jack2
    ];
  
    mesonFlags = [
  
negative.code: , mpg123
  , twolame
  , gtkSupport ? false, gtk3 ? null
  , enableJack ? true, libjack2
  , libXdamage
  , libXext
  , libXfixes
  