cmake version too old

Ubuntu 9.04 has Cmake 2.6.4

Latest ryzom-client from mercurial

mx@2-desktop:~/ryzom/code/ryzom/build$ cmake -DWITH_SERVER=OFF -DWITH_TOOLS=OFF ..
CMake Error at CMakeLists.txt:39 (CMAKE_MINIMUM_REQUIRED):
CMake 2.8 or higher is required. You are running version 2.6.4

-- Configuring incomplete, errors occurred!

##Purge Cmake  (remove the original version cmake)
sudo apt-get purge cmake cmake-data

##Grab Cmake 2.8 (download the two packages)
http://nl.archive.ubuntu.com/ubuntu/pool/main/c/cmake/cmake-data_2.8.0-5ubuntu1~karmic1_all.deb
http://nl.archive.ubuntu.com/ubuntu/pool/main/c/cmake/cmake_2.8.0-5ubuntu1~karmic1_i386.deb

and then type the command :

dpkg -i cmake-data_2.8.0-5ubuntu1~karmic1_all.deb
dpkg -i cmake_2.8.0-5ubuntu1~karmic1_i386.deb