hpx cmake on WIndows w/ Windows-style BOOST_ROOT

gistfile1.txt

c:\Users\Lars\bounce\build\hpx-git-vc110>cmake -G "Visual Studio 11 Win64" ..\..
\hpx-git -DCMAKE_BUILD_TYPE=Debug -DBOOST_ROOT=C:\users\Lars\local\boost-1.54.0\
v110
-- The CXX compiler identification is MSVC 17.0.61030.0
-- The C compiler identification is MSVC 17.0.61030.0
-- Check for working CXX compiler using: Visual Studio 11 Win64
-- Check for working CXX compiler using: Visual Studio 11 Win64 -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working C compiler using: Visual Studio 11 Win64
-- Check for working C compiler using: Visual Studio 11 Win64 -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
[hpx.info.fortran] Found a Fortran compiler
[hpx.warn.boost.version] Could not locate Boost include directory. Now searching
 versioned include directory (C:\users\Lars\local\boost-1.54.0\v110/include).
CMake Error at cmake/HPX_Message.cmake:23 (message):
  Syntax error in cmake code at

    C:/Users/Lars/bounce/hpx-git/cmake/HPX_Message.cmake:23

  when parsing string

    Could not locate Boost include directory in C:\users\Lars\local\boost-1.54.0
\v110/include. Now searching the system.

  Invalid escape sequence \u
Call Stack (most recent call first):
  cmake/FindHPX_BoostVersion.cmake:69 (hpx_warn)
  cmake/FindHPX_BoostVersion.cmake:156 (get_boost_version)
  CMakeLists.txt:101 (find_package)


-- Configuring incomplete, errors occurred!
See also "C:/Users/Lars/bounce/build/hpx-git-vc110/CMakeFiles/CMakeOutput.log".

c:\Users\Lars\bounce\build\hpx-git-vc110>