anchor.diff:  )
   @cd %mesa%mesa
   @set openswr=n
  -@set sconscmd=python %mesa%Python\%abi%\Scripts\scons.py build=release platform=windows machine=%longabi% libgl-gdi
  +@set sconscmd=python %mesa%Python\Scripts\scons.py build=release platform=windows machine=%longabi% libgl-gdi
   @set /p openswr=Do you want to build OpenSWR drivers? (y=yes):
   @echo.
   @if /I "%openswr%"=="y" set sconscmd=%sconscmd% swr=1
  
positive.code: @if NOT "%ProgramW6432%"=="" set vsenv=%vsenv% (x86)
  @set vsenv15=%vsenv%\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars%minabi%.bat"
  @set vsenv14="%VS140COMNTOOLS%..\..\VC\bin\vcvars%minabi%.bat"
  @set gcc=%mesa%mingw-w64-%abi%\mingw%minabi%\bin
  @set vsenvloaded=0
  @set dxtnbuilt=0
  @set toolset=14
  
negative.code: @if EXIST build\windows-%longabi% set /p cleanbuild=Do you want to clean build (y/n):
  @if EXIST build\windows-%longabi% echo.
  @if /I "%cleanbuild%"=="y" RD /S /Q build\windows-%longabi%
  @set PATH=%mesa%Python\;%mesa%Python\Scripts\;%mesa%flexbison\;%PATH%
  @python -m pip install -U mako
  @python -m pip freeze > requirements.txt
  @python -m pip install -r requirements.txt --upgrade
  