Stupid script.

.appveyor.yml

@@ -35,7 +35,7 @@ build_script:
   # - ${PYTHON} 101_FileIO.py
   # - cd ../../
   # Tutorials and tests
-  - set PATH="C:\Python%PYTHON%-64\;C:\Python%PYTHON%-64\Scripts;%PATH%"
+  - set PATH=C:\Python%PYTHON%-x64;C:\Python%PYTHON%-x64\Scripts;%PATH%
   - mkdir build
   - cd build
   - cmake -DCMAKE_BUILD_TYPE=%CONFIG% -DLIBIGL_WITH_CGAL=ON -DLIBIGL_WITH_COMISO=OFF -G "Visual Studio 15 2017 Win64" ../