anchor.diff:    ] ++ stdenv.lib.optionals (!libOnly) [
       optLibjack2 optDbus optDbus_cplusplus optAlsaLib optPyqt4
       optXdg_utils
  -    # dbus dbus_cplusplus glibmm
  -    # pyqt4
  -    # python pythonDBus qt4
     ];
   
     patches = [ ./build-fix.patch ];
  
positive.code:   optDbus_cplusplus = shouldUsePkg dbus_cplusplus;
    optAlsaLib = shouldUsePkg alsaLib;
    optPyqt4 = shouldUsePkg pyqt4;
    optXdg_utils = shouldUsePkg xdg_utils;
  in
  stdenv.mkDerivation rec {
  
negative.code: 
  # Optional dependencies
  , libjack2 ? null, dbus ? null, dbus_cplusplus ? null, alsaLib ? null
  , pyqt4 ? null, pythonDBus ? null, xdg_utils ? null
  
  # Other Flags
  , prefix ? ""
  