Funcsigs can not be install in 4.3.10 buildout

hi there,

After a system crash I try to rerun buildount on using plone 4.3.10
i get an error that funcsigs can not be installed:

how can i fix that?



Picked: xlutils = 2.0.0

We have no distributions for funcsigs that satisfies 'funcsigs'.

Getting distribution for 'funcsigs'.

Running easy_install:

"/home/zope/energieclusterR56/bin/python" "-c" "from
setuptools.command.easy_install import main; main()" "-mZUNxd"


Processing funcsigs-1.0.2.tar.gz

Writing /tmp/easy_install-nblpYo/funcsigs-1.0.2/setup.cfg

Running funcsigs-1.0.2/ -q bdist_egg --dist-dir

Searching for setuptools>=17.1

Best match: setuptools 24.0.2

Using /home/zope/energieclusterR56/lib/python2.7/site-packages

error: Setup script exited with error in funcsigs setup command: Invalid
environment marker: python_version<"2.7"

An error occurred when trying to install funcsigs 1.0.2. Look above this
message for any errors that were output by easy_install.


Installing instance.

Getting distribution for 'funcsigs'.

Error: Couldn't install: funcsigs 1.0.2

You may try to upgrade pip and/or setuptools in the virtualenv you run your buildout from.

pip install --upgrade pip && pip install --upgrade setuptools