anchor.diff:          inherit (source) sha256;
         };
   
  -  nativeBuildInputs = optionals (config == "mumble")[
  +  nativeBuildInputs = optionals (config == "mumble") [
       python2
       qt4
       qt5
  +  ] ++ optionals (config == "murmur") [
  +    which
     ];
   
     buildInputs = [
  
positive.code: , fetchgit
  , fetchurl
  , python2
  
  , alsa-lib
  , avahi
  , boost
  , ice
  , jack2_lib
  , libcap
  
negative.code:     "${boolNo (qt5 == null)}qt4-legacy-compat"
    ] ++ optionals (config == "murmur") [
      "${boolNo (ice != null)}ice"
      "${boolNo (grpc != null)}grpc"
      "qssldiffiehellmanparameters"
    ];
  
  