anchor.diff:    postPatch = optionalString (config == "mumble") ''
       export MUMBLE_PYTHON="${python2}/bin/python"
       patchShebangs ./scripts/rcc-depends.py
  +  '' + optionalString (config == "murmur" && ice != null) ''
  +    sed -i 's,/usr,${ice},g' src/murmur/murmur_ice/murmur_ice.pro
     '';
   
     configureFlags = [
  
positive.code: , boost
  , fixesproto
  , grpc
  , inputproto
  , jack2_lib
  , libcap
  
negative.code:     "${boolNo mumbleOverlay}overlay"
      "no-qt4-legacy-compat"
    ] ++ optionals (config == "murmur") [
      "${boolNo (ice != null)}ice"
      "${boolNo (grpc != null)}grpc"
      "qssldiffiehellmanparameters"
    ];
  