[ase-users] Installation issue

[ingram]

When running the tests that come with ASE I encounter this issue:

======================================================================
ERROR: qmmm.py (ScriptTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
   File "/usr/local/lib/python2.7/dist-packages/ase/test/__init__.py", 
line 51, in testfile
     {'display': self.display})
   File "/usr/local/lib/python2.7/dist-packages/ase/test/qmmm.py", line 
10, in <module>
     from gpaw import GPAW
ImportError: No module named gpaw

----------------------------------------------------------------------
Ran 143 tests in 167.849s

FAILED (errors=1)

After installing GPAW using these commands:
  sudo apt-get update; sudo apt-get -y install gpaw

I get this error :
ingram at theobook74:/tmp$ sudo apt-get -y install gpaw
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package gpaw is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'gpaw' has no installation candidate

What seems to be the problem? I am using Ubuntu 14.04 LTS