[gentoo-user] Compiling uranium-2.6.0: Wrong python version, but...

Hi,

compiling uranium failed here. From the output:
-- Using CURA_BINARY_DATA_DIRECTORY from set of environment variables...
CMake Error at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
  Could NOT find PythonInterp: Found unsuitable version "3.4.6", but required
  is at least "3.5.0" (found
  /var/tmp/portage/dev-python/uranium-2.6.0/temp/python3.4/bin/python)
Call Stack (most recent call first):
  /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:375 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake/Modules/FindPythonInterp.cmake:158 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  CMakeLists.txt:13 (find_package)


-- Configuring incomplete, errors occurred!
See also "/var/tmp/portage/dev-python/uranium-2.6.0/work/uranium-2.6.0_build/CMakeFiles/CMakeOutput.log".
 * ERROR: dev-python/uranium-2.6.0::gentoo failed (configure phase):
 *   cmake failed
 * 
 * Call stack:
 *     ebuild.sh, line  124:  Called src_configure
 *   environment, line 4080:  Called cmake-utils_src_configure
 *   environment, line 1096:  Called die
 * The specific snippet of code:
 *       "${CMAKE_BINARY}" "${cmakeargs[@]}" "${CMAKE_USE_DIR}" || die "cmake failed";
 * 
 * If you need support, post the output of `emerge --info '=dev-python/uranium-2.6.0::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=dev-python/uranium-2.6.0::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/dev-python/uranium-2.6.0/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-python/uranium-2.6.0/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-python/uranium-2.6.0/work/uranium-2.6.0_build'
 * S: '/var/tmp/portage/dev-python/uranium-2.6.0/work/Uranium-2.6.0'
[1]    15403 exit 1     emerge media-gfx/cura

But:
root>python --version
Python 3.5.4

eselect python list
Available Python interpreters, in order of preference:
  [1]   python3.5
  [2]   python3.4
  [3]   python2.7


How can I fix this?

Thanks a lot for any help in advance!
Cheers
Meino