anchor.diff:      -DWITH_BULLET_EXAMPLE=OFF ^
       -DWITH_CUBEMAP_EXAMPLE=ON ^
       -DWITH_MOTIONBLUR_EXAMPLE=ON ^
  -    -DWITH_OVR_EXAMPLE=ON ^
  +    -DWITH_OVR_EXAMPLE=OFF ^
       -DWITH_PICKING_EXAMPLE=ON ^
       -DWITH_PRIMITIVES_EXAMPLE=ON ^
       -DWITH_TEXT_EXAMPLE=ON ^
  
positive.code:     -DCMAKE_BUILD_TYPE=Release ^
      -DCMAKE_INSTALL_PREFIX=%APPVEYOR_BUILD_FOLDER%/deps ^
      -DWITH_BULLET=OFF ^
      -DWITH_OVR=ON ^
      -G "MinGW Makefiles" || exit /b
  cmake --build . -- -j || exit /b
  cmake --build . --target install -- -j || exit /b
  
negative.code: cd .. && cd ..
  
  rem Build Magnum Integration
  rem For MinGW it's not possible to use the OVR SDK directly, the Oculus Runtime
  rem is needed to be installed, but that's apparently not possible from a
  rem command-line so I'm just disabling it.
  rem https://forums.oculus.com/community/discussion/18303/silent-installation-of-oculus-runtime-windows
  git clone --depth 1 git://github.com/mosra/magnum-integration.git || exit /b
  cd magnum-integration || exit /b
  mkdir build && cd build || exit /b
  