qwinmime_wrapper.cpp(101): error C2259: 'QWinMimeWrapper': cannot instantiate abstract class

(testenv) C:\pyside-setup\testenv3_build\py3.5-qt5.6.3-64bit-release\pyside2\PySide2\QtWinExtras>nmake

Microsoft (R) Program Maintenance Utility Version 14.00.24210.0
Copyright (C) Microsoft Corporation.  All rights reserved.

[  5%] Built target pyside2
[ 45%] Built target QtCore
[ 97%] Built target QtGui
[ 97%] Building CXX object PySide2/QtWinExtras/CMakeFiles/QtWinExtras.dir/PySide2/QtWinExtras/qwinmime_wrapper.cpp.obj
qwinmime_wrapper.cpp
C:\pyside-setup\testenv3_build\py3.5-qt5.6.3-64bit-release\pyside2\PySide2\QtWinExtras\PySide2\QtWinExtras\qwinmime_wrapper.cpp(101): error C2259: 'QWinMimeWrapper': cannot instantiate abstract class
C:\pyside-setup\testenv3_build\py3.5-qt5.6.3-64bit-release\pyside2\PySide2\QtWinExtras\PySide2\QtWinExtras\qwinmime_wrapper.cpp(101): note: due to following members:
C:\pyside-setup\testenv3_build\py3.5-qt5.6.3-64bit-release\pyside2\PySide2\QtWinExtras\PySide2\QtWinExtras\qwinmime_wrapper.cpp(101): note: 'bool QWinMime::canConvertFromMime(const FORMATETC &,const QMimeData *) const': is abstract
c:\qt\build\qt56-msvc2015\qtbase\include\qtwinextras\../../../../../qt5/qtwinextras/src/winextras/qwinmime.h(56): note: see declaration of 'QWinMime::canConvertFromMime'
C:\pyside-setup\testenv3_build\py3.5-qt5.6.3-64bit-release\pyside2\PySide2\QtWinExtras\PySide2\QtWinExtras\qwinmime_wrapper.cpp(101): note: 'bool QWinMime::convertFromMime(const FORMATETC &,const QMimeData *,STGMEDIUM *) const': is abstract
c:\qt\build\qt56-msvc2015\qtbase\include\qtwinextras\../../../../../qt5/qtwinextras/src/winextras/qwinmime.h(57): note: see declaration of 'QWinMime::convertFromMime'
C:\pyside-setup\testenv3_build\py3.5-qt5.6.3-64bit-release\pyside2\PySide2\QtWinExtras\PySide2\QtWinExtras\qwinmime_wrapper.cpp(101): note: 'QVector<FORMATETC> QWinMime::formatsForMime(const QString &,const QMimeData *) const': is abstract
c:\qt\build\qt56-msvc2015\qtbase\include\qtwinextras\../../../../../qt5/qtwinextras/src/winextras/qwinmime.h(58): note: see declaration of 'QWinMime::formatsForMime'
C:\pyside-setup\testenv3_build\py3.5-qt5.6.3-64bit-release\pyside2\PySide2\QtWinExtras\PySide2\QtWinExtras\qwinmime_wrapper.cpp(101): note: 'bool QWinMime::canConvertToMime(const QString &,IDataObject *) const': is abstract
c:\qt\build\qt56-msvc2015\qtbase\include\qtwinextras\../../../../../qt5/qtwinextras/src/winextras/qwinmime.h(61): note: see declaration of 'QWinMime::canConvertToMime'
C:\pyside-setup\testenv3_build\py3.5-qt5.6.3-64bit-release\pyside2\PySide2\QtWinExtras\PySide2\QtWinExtras\qwinmime_wrapper.cpp(101): note: 'QVariant QWinMime::convertToMime(const QString &,IDataObject *,QVariant::Type) const': is abstract
c:\qt\build\qt56-msvc2015\qtbase\include\qtwinextras\../../../../../qt5/qtwinextras/src/winextras/qwinmime.h(62): note: see declaration of 'QWinMime::convertToMime'
C:\pyside-setup\testenv3_build\py3.5-qt5.6.3-64bit-release\pyside2\PySide2\QtWinExtras\PySide2\QtWinExtras\qwinmime_wrapper.cpp(101): note: 'QString QWinMime::mimeForFormat(const FORMATETC &) const': is abstract
c:\qt\build\qt56-msvc2015\qtbase\include\qtwinextras\../../../../../qt5/qtwinextras/src/winextras/qwinmime.h(63): note: see declaration of 'QWinMime::mimeForFormat'
NMAKE : fatal error U1077: 'C:\PROGRA~2\MICROS~1.0\VC\bin\amd64\cl.exe' : return code '0x2'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\amd64\nmake.exe"' : return code '0x2'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\amd64\nmake.exe"' : return code '0x2'
Stop.