Pyinstaller, Pyside issue on Linux

Question

I am trying to build a exe for Ubuntu with pyinstaller and hit an error after it successfully builds.

My error is: Traceback (most recent call last):
File "<string>", line 36, in <module>
ImportError: No module named QtCore

In my app I use from PySide import QtGui, QtCore

My spec file looks like:

 -*- mode: python -*-
a = Analysis(['/home/tom/NJM_GUI.py'],
         pathex=['/usr/lib/python2.7/dist-packages/PySide/', '/home/tom'],
         hiddenimports=[],
         hookspath=None,
         runtime_hooks=None)
pyz = PYZ(a.pure)
exe = EXE(pyz,
      a.scripts,
      a.binaries,
      a.zipfiles,
      a.datas,
      name='NJM_GUI',
      debug=False,
      strip=None,
      upx=True,
      console=True )

I built it like this:

pyinstaller -F '/home/tom/NJM_GUI.py'  -p '/usr/lib/python2.7/dist-packages/PySide/'

What do I do to fix this issue? Exe gets built fine but seems to be missing this module.

Thanks,

Tom