pip error

Downloading/unpacking matplotlib
  Running setup.py (path:/home/andreas/.virtualenvs/Bachelorarbeit/build/matplotlib/setup.py) egg_info for package matplotlib
    Traceback (most recent call last):
      File "<string>", line 17, in <module>
      File "/home/andreas/.virtualenvs/Bachelorarbeit/build/matplotlib/setup.py", line 155, in <module>
        result = package.check()
      File "/home/andreas/.virtualenvs/Bachelorarbeit/build/matplotlib/setupext.py", line 961, in check
        min_version='2.3', version=version)
      File "/home/andreas/.virtualenvs/Bachelorarbeit/build/matplotlib/setupext.py", line 445, in _check_for_pkg_config
        if (not is_min_version(version, min_version)):
      File "/home/andreas/.virtualenvs/Bachelorarbeit/build/matplotlib/setupext.py", line 173, in is_min_version
        return found_version >= expected_version
      File "/usr/lib64/python3.4/distutils/version.py", line 76, in __ge__
        c = self._cmp(other)
      File "/usr/lib64/python3.4/distutils/version.py", line 343, in _cmp
        if self.version < other.version:
    TypeError: unorderable types: str() < int()
    ============================================================================
    Edit setup.cfg to change the build options

    BUILDING MATPLOTLIB
                matplotlib: yes [1.4.3]
                    python: yes [3.4.3 (default, Feb 26 2015, 23:01:07)  [GCC
                            4.9.2 20150204 (prerelease)]]
                  platform: yes [linux]

    REQUIRED DEPENDENCIES AND EXTENSIONS
                     numpy: yes [version 1.9.2]
                       six: yes [using six version 1.9.0]
                  dateutil: yes [using dateutil version 2.4.1]
                      pytz: yes [using pytz version 2014.10]
                   tornado: yes [using tornado version 4.1]
                 pyparsing: yes [pyparsing was not found. It is required for
                            mathtext support. pip/easy_install may attempt to
                            install it after matplotlib.]
                     pycxx: yes [Official versions of PyCXX are not compatible
                            with matplotlib on Python 3.x, since they lack
                            support for the buffer object.  Using local copy]
                    libagg: yes [pkg-config information for 'libagg' could not
                            be found. Using local copy.]
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 17, in <module>

  File "/home/andreas/.virtualenvs/Bachelorarbeit/build/matplotlib/setup.py", line 155, in <module>

    result = package.check()

  File "/home/andreas/.virtualenvs/Bachelorarbeit/build/matplotlib/setupext.py", line 961, in check

    min_version='2.3', version=version)

  File "/home/andreas/.virtualenvs/Bachelorarbeit/build/matplotlib/setupext.py", line 445, in _check_for_pkg_config

    if (not is_min_version(version, min_version)):

  File "/home/andreas/.virtualenvs/Bachelorarbeit/build/matplotlib/setupext.py", line 173, in is_min_version
return found_version >= expected_version

  File "/usr/lib64/python3.4/distutils/version.py", line 76, in __ge__

    c = self._cmp(other)

  File "/usr/lib64/python3.4/distutils/version.py", line 343, in _cmp

    if self.version < other.version:

TypeError: unorderable types: str() < int()

============================================================================

Edit setup.cfg to change the build options



BUILDING MATPLOTLIB

            matplotlib: yes [1.4.3]

                python: yes [3.4.3 (default, Feb 26 2015, 23:01:07)  [GCC

                        4.9.2 20150204 (prerelease)]]

              platform: yes [linux]



REQUIRED DEPENDENCIES AND EXTENSIONS

                 numpy: yes [version 1.9.2]

                   six: yes [using six version 1.9.0]

              dateutil: yes [using dateutil version 2.4.1]

                  pytz: yes [using pytz version 2014.10]

               tornado: yes [using tornado version 4.1]

             pyparsing: yes [pyparsing was not found. It is required for

                        mathtext support. pip/easy_install may attempt to

                        install it after matplotlib.]

                 pycxx: yes [Official versions of PyCXX are not compatible

                        with matplotlib on Python 3.x, since they lack

                        support for the buffer object.  Using local copy]

                libagg: yes [pkg-config information for 'libagg' could not

                        be found. Using local copy.]

----------------------------------------
Cleaning up...
Command python setup.py egg_info failed with error code 1 in /home/andreas/.virtualenvs/Bachelorarbeit/build/matplotlib
Storing debug log for failure in /home/andreas/.pip/pip.log