Problems with Installation on Debian Squeeze

I'm trying to fenics (manually) on my debian squeeze system. I can't run the poisson demo located at ../dolfin/demo/pde/poisson/python

Here is the output that i get:

pratik@HyperIon:~/Install/share/dolfin/demo/pde/poisson/python$ python demo_poisson.py
Calling FFC just-in-time (JIT) compiler, this may take some time.
Traceback (most recent call last):
  File "demo_poisson.py", line 41, in <module>
    V = FunctionSpace(mesh, "Lagrange", 1)
  File "/home/pratik/Install/lib/python2.6/dist-packages/dolfin/functions/functionspace.py", line 353, in __init__
    FunctionSpaceBase.__init__(self, mesh, element)
  File "/home/pratik/Install/lib/python2.6/dist-packages/dolfin/functions/functionspace.py", line 77, in __init__
    ufc_element, ufc_dofmap = jit(self._ufl_element)
  File "/home/pratik/Install/lib/python2.6/dist-packages/dolfin/compilemodules/jit.py", line 66, in mpi_jit
    return local_jit(*args, **kwargs)
  File "/home/pratik/Install/lib/python2.6/dist-packages/dolfin/compilemodules/jit.py", line 154, in jit
    return jit_compile(form, parameters=p, common_cell=common_cell)
  File "/home/pratik/Install/lib/python2.6/ffc/jitcompiler.py", line 71, in jit
    return jit_element(ufl_object, parameters)
  File "/home/pratik/Install/lib/python2.6/ffc/jitcompiler.py", line 178, in jit_element
    compiled_form, module, form_data, prefix = jit_form(form, parameters)
  File "/home/pratik/Install/lib/python2.6/ffc/jitcompiler.py", line 130, in jit_form
    common_cell=common_cell)
  File "/home/pratik/Install/lib/python2.6/ffc/compiler.py", line 155, in compile_form
    ir = compute_ir(analysis, parameters, common_cell)
  File "/home/pratik/Install/lib/python2.6/ffc/representation.py", line 73, in compute_ir
    for (i, e) in enumerate(elements)]
  File "/home/pratik/Install/lib/python2.6/ffc/representation.py", line 99, in _compute_element_ir
    element = create_element(ufl_element)
  File "/home/pratik/Install/lib/python2.6/ffc/fiatinterface.py", line 68, in create_element
    element = _create_fiat_element(ufl_element)
  File "/home/pratik/Install/lib/python2.6/ffc/fiatinterface.py", line 121, in _create_fiat_element
    if not family in FIAT.supported_elements:
AttributeError: 'module' object has no attribute 'supported_elements'

Also, I tried to run the C++ version as well; However i get the following:

pratik@HyperIon:~/Install/share/dolfin/demo/pde/poisson/cpp$ cmake . && make && ./demo_poisson
-- Configuring done
-- Generating done
-- Build files have been written to: /home/pratik/Install/share/dolfin/demo/pde/poisson/cpp
[100%] Built target demo_poisson
Solving linear variational problem.
terminate called after throwing an instance of 'std::runtime_error'
  what():

*** -------------------------------------------------------------------------
*** DOLFIN encountered an error. If you are not able to resolve this issue
*** using the information listed below, you can ask for help at
***
*** https://answers.launchpad.net/dolfin
***
*** Remember to include the error message listed below and, if possible,
*** include a *minimal* running example to reproduce the error.
***
*** -------------------------------------------------------------------------
*** Error: Unable to factorize matrix with UMFPACK LU solver (symbolic).
*** Reason: UMFPACK has not been installed.
*** Where: This error was encountered inside UmfpackLUSolver.cpp.
*** -------------------------------------------------------------------------

Aborted

This seems strange as I have installed umfpack (relevant debian packages: libsuitesparse-dev and libumfpack). Even the configuration of dolfin confirms that umfpack is installed:

pratik@HyperIon:~/Source/Numerical/Fenics/dolfin/dolfin-1.0.0$ cmake .
-- UFC version: 2.0.5
-- Checking for package 'Armadillo'
-- Checking for package 'AMD'
-- Checking for package 'BLAS'
-- Checking for package 'UMFPACK'
-- Checking for package 'AMD'
-- Checking for package 'BLAS'
-- Checking for package 'CHOLMOD'
-- Checking for package 'AMD'
-- Checking for package 'BLAS'
-- ParMETIS could not be found/configured. (missing: PARMETIS_LIBRARIES PARMETIS_TEST_RUNS PARMETIS_INCLUDE_DIRS)
-- Checking for package 'LAPACK'
-- Checking for package 'CHOLMOD'
-- Checking for package 'AMD'
-- Checking for package 'BLAS'
-- ParMETIS could not be found/configured. (missing: PARMETIS_LIBRARIES PARMETIS_TEST_RUNS PARMETIS_INCLUDE_DIRS)
-- Checking for package 'LAPACK'
-- Checking for package 'CGAL'
-- Checking for package 'CPPUNIT'
-- CPPUNIT could not be found. Be sure to set CPPUNIT_DIR. (missing: CPPUNIT_LIBRARIES CPPUNIT_INCLUDE_DIRS)
-- Checking for package 'Sphinx'
-- Could NOT find Sphinx (missing: SPHINX_VERSION_OK)
--
-- The following optional packages were found:
-- -------------------------------------------
-- (OK) UMFPACK
-- (OK) CHOLMOD
-- (OK) CGAL
-- (OK) ZLIB
-- (OK) PYTHON
--
-- The following optional packages were not enabled:
-- -------------------------------------------------
-- (--) OPENMP
-- (--) MPI
-- (--) PETSC
-- (--) SLEPC
-- (--) TRILINOS
-- (--) MTL4
-- (--) SCOTCH
-- (--) PARMETIS
-- (--) SPHINX
--
CMake Warning at CMakeLists.txt:584 (message):
  Disabling generation of documentation because Sphinx is missing.

-- Configuring done
-- Generating done
-- Build files have been written to: /home/pratik/Source/Numerical/Fenics/dolfin/dolfin-1.0.0

What am I missing? Any help would be appreciated.