Unable to install "mesa-utils-extra" on 12.04.2

[Ma Hsiao-chun]

$ sudo apt-get install mesa-utils-extra
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 mesa-utils-extra : Depends: libgles2-mesa (>= 7.8.1) or
                             libgles2
E: Unable to correct problems, you have held broken packages.

I tried to use "ubuntu-bug mesa-utils-extra". It shows:
No packages found matching mesa-utils-extra.
ERROR: hook /usr/share/apport/general-hooks/cloud_archive.py crashed:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/apport/report.py", line 719, in add_hooks_info
    symb['add_info'](self, ui)
  File "/usr/share/apport/general-hooks/cloud_archive.py", line 18, in add_info
    if '~cloud' in packaging.get_version(package) and \
  File "/usr/lib/python2.7/dist-packages/apport/packaging_impl.py", line 95, in get_version
    raise ValueError('package does not exist')
ValueError: package does not exist