anchor.diff:  , ninja
   , vala
   , gtk3
  +, glib
   , granite
   , libnotify
   , wingpanel
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "wingpanel-indicator-bluetooth";
    version = "2.1.4";
  
    src = fetchFromGitHub {
      owner = "elementary";
      repo = pname;
      rev = version;
      sha256 = "05v3qy4rxi4l3g1ql99vcjylb01hz3galh19c2jc3lqc1mf1z1j1";
    };
  
    passthru = {
  
negative.code:   ];
  
    buildInputs = [
      glib
      granite
      gtk3
      libgee
  