Building on ubuntu 12.10

Hi, everybody. Is there any solution to fix something like this?

$ jhbuild bootstrap

... all correct ...

$ jhbuild sysdeps --install

...
Required packages:
   Packages too old:
     (none)
   No match with system package
     soundtouch (soundtouch-1.4.pc, required=0)
     libicu (icu-i18n.pc, required=4)
     libunistring
     yajl
     device-mapper

...

I read something about libicu in 
https://live.gnome.org/JhbuildDependencies/Ubuntu, but It do not explain 
where to checkout an how to compile

I have tried

$ svn checkout http://source.icu-project.org/repos/icu/icu/tags/release-4-8/

$ cd release-4-8/source
$ ./autogen.sh --prefix=/opt/gnome
$ make
$ make install

but no luck.

My system is 64bits.