--- debian/patches/ubuntu_cmake-crosscompile.patch	2015-05-29 11:22:23.000000000 +0200
+++ /tmp/ubuntu_cmake-crosscompile.patch	2015-06-13 02:13:05.164808842 +0200
@@ -15,6 +15,7 @@
 +  # cross-compilation on debian systems out of the box
 +  if(EXISTS "/etc/debian_version")
 +    include(${CMAKE_ROOT}/Modules/MultiArchCross.cmake OPTIONAL RESULT_VARIABLE _INCLUDED_MULTIARCH_TOOLCHAIN_FILE)
++    set(CMAKE_TOOLCHAIN_FILE "${CMAKE_ROOT}/Modules/MultiArchCross.cmake" CACHE FILEPATH "The CMake toolchain file" FORCE)
 +  endif()
  endif()