anchor.diff:      rm -rf "$out/nix-support"
   
       export PYTHONPATH=$PYTHONPATH:$out/lib/${python.libPrefix}/site-packages
  +    ${stdenv.lib.optionalString stdenv.isDarwin ''
  +      export QMAKESPEC="unsupported/macx-clang-libc++" # OS X target after bootstrapping phase \
  +    ''}
   
       substituteInPlace configure.py \
  -      --replace 'install_dir=pydbusmoddir' "install_dir='$out/lib/${python.libPrefix}/site-packages/dbus/mainloop'"
  +      --replace 'install_dir=pydbusmoddir' "install_dir='$out/lib/${python.libPrefix}/site-packages/dbus/mainloop'" \
  +    ${stdenv.lib.optionalString stdenv.isDarwin ''
  +      --replace "qt_macx_spec = 'macx-g++'" "qt_macx_spec = 'unsupported/macx-clang-libc++'" # for bootstrapping phase \
  +    ''}
   
       configureFlagsArray=( \
         --confirm-license --bindir $out/bin \
  
positive.code:     description = "Python bindings for Qt";
      license = "GPL";
      homepage = http://www.riverbankcomputing.co.uk;
      maintainers = [ lib.maintainers.sander ];
      platforms = lib.platforms.mesaPlatforms;
    };
  }
  
negative.code: { stdenv, fetchurl, pythonPackages, qt4, pkgconfig, lndir, dbus_libs, makeWrapper }:
  
  let
    version = "4.11.3";
  