anchor.diff:  
   REM unzip to devel directory
   rmdir /S /Q "C:\RStudio-devel"
  -7zip x RStudio-99.9.9.zip -o"C:\RStudio-devel"
  +7z x RStudio-99.9.9.zip -o"C:\RStudio-devel"
   
   REM reset modified environment variables (PATH)
   endlocal
  
positive.code: mkdir "%BUILD_DIR%"
  cd "%BUILD_DIR%"
  cmake -G"MinGW Makefiles" -DRSTUDIO_TARGET=Desktop -DCMAKE_BUILD_TYPE=%CMAKE_BUILD_TYPE% -DRSTUDIO_PACKAGE_BUILD=1 ..\..\..
  mingw32-make -j10
  cd ..
  
  REM perform 64-bit build and install it into the 32-bit tree
  
negative.code: REM Prepend Qt 5.4 SDK Mingw to path
  setlocal
  set PATH=C:\Qt\Qt5.4.0\Tools\mingw491_32\bin;%PATH%
  
  REM Strip Rtools out of the path (persume it's in the default location)
  CALL SET PATH=%PATH:C:\Rtools\bin;=%
  CALL SET PATH=%PATH:C:\Rtools\gcc-4.6.3\bin;=%
  
  REM Establish build dir
  set BUILD_DIR=build
  