Found PythonInterp: C:/Python33/python.exe (found version "3.3.1") 
Constructing LLVMBuild project information
CMake Error at CMakeLists.txt:310 (message):
  Unexpected failure executing llvm-build: Traceback (most recent call last):

    File "A:/Proton/llvm/utils/llvm-build/llvm-build", line 3, in <module>
      import llvmbuild
    File "A:\Proton\llvm\utils\llvm-build\llvmbuild\__init__.py", line 1, in <module>
      from main import main

  ImportError: No module named 'main'


Configuring incomplete, errors occurred!