anchor.diff:  , wayland-protocols
   , xineramaSupport ? stdenv.isLinux
   , cupsSupport ? stdenv.isLinux
  +, withGtkDoc ? stdenv.isLinux
   , cups ? null
   , AppKit
   , Cocoa
  
positive.code:   pname = "gtk+3";
    version = "3.24.12";
  
    outputs = [ "out" "dev" "devdoc" ];
    outputBin = "dev";
  
    setupHooks = [
  
negative.code:   separateDebugInfo = stdenv.isLinux;
  
    mesonFlags = [
      "-Dgtk_doc=${boolToString withGtkDoc}"
      "-Dtests=false"
    ];
  
  