CMake fails to run

[JL2210]

Build log:

~snip~
-- Try C++11 flag = [-std=gnu++0x]
-- Performing Test CXX11_FLAG_DETECTED
-- Performing Test CXX11_FLAG_DETECTED - Success
-- Found clang: /home/jill/build/git/wclang/clang-4.0
CMake Error at CMakeLists.txt:71 (string):
  string sub-command REGEX, mode REPLACE needs at least 6 arguments total to
  command.


-- Found mingw-gcc: /usr/bin/i686-w64-mingw32-gcc-win32
-- Found mingw-gcc: /usr/bin/x86_64-w64-mingw32-gcc-win32
-- Configuring incomplete, errors occurred!
~snip~