Unable to renew letsencryt certificate due to python installation

Hi,

I used to have a SSL certificate from letsencrypt to access my NAS from outside with my domain. Recently my certificate expire and now when I try to run the Cerbot im getting an error with python packages:

Creating virtual environment...
Installing Python packages...
Had a problem while installing Python packages.

pip prints the following errors:
=====================================================
Collecting argparse==1.4.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 11))
  Downloading argparse-1.4.0-py2.py3-none-any.whl
Collecting pycparser==2.14 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 17))
  Downloading pycparser-2.14.tar.gz (223kB)
Collecting asn1crypto==0.22.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 21))
  Downloading asn1crypto-0.22.0-py2.py3-none-any.whl (97kB)
Collecting cffi==1.10.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 24))
  Downloading cffi-1.10.0.tar.gz (418kB)
Collecting ConfigArgParse==0.12.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 61))
  Downloading ConfigArgParse-0.12.0.tar.gz (41kB)
Collecting configobj==5.0.6 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 63))
  Downloading configobj-5.0.6.tar.gz
Collecting cryptography==2.0.2 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 65))
  Downloading cryptography-2.0.2.tar.gz (427kB)
Collecting enum34==1.1.2 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 96))
  Downloading enum34-1.1.2.tar.gz (46kB)
Collecting funcsigs==1.0.2 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 99))
  Downloading funcsigs-1.0.2-py2.py3-none-any.whl
Collecting idna==2.5 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 102))
  Downloading idna-2.5-py2.py3-none-any.whl (55kB)
Collecting ipaddress==1.0.16 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 105))
  Downloading ipaddress-1.0.16-py27-none-any.whl
Collecting linecache2==1.0.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 108))
  Downloading linecache2-1.0.0-py2.py3-none-any.whl
Collecting ordereddict==1.1 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 111))
  Downloading ordereddict-1.1.tar.gz
Collecting packaging==16.8 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 113))
  Downloading packaging-16.8-py2.py3-none-any.whl
Collecting parsedatetime==2.1 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 116))
  Downloading parsedatetime-2.1-py2-none-any.whl
Collecting pbr==1.8.1 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 119))
  Downloading pbr-1.8.1-py2.py3-none-any.whl (89kB)
Collecting pyOpenSSL==16.2.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 122))
  Downloading pyOpenSSL-16.2.0-py2.py3-none-any.whl (43kB)
Collecting pyparsing==2.1.8 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 125))
  Downloading pyparsing-2.1.8-py2.py3-none-any.whl (54kB)
Collecting pyRFC3339==1.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 134))
  Downloading pyRFC3339-1.0-py2.py3-none-any.whl
Collecting python-augeas==0.5.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 137))
  Downloading python-augeas-0.5.0.tar.gz (90kB)
Collecting pytz==2015.7 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 139))
  Downloading pytz-2015.7-py2.py3-none-any.whl (476kB)
Collecting requests==2.12.1 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 153))
  Downloading requests-2.12.1-py2.py3-none-any.whl (574kB)
Collecting six==1.10.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 156))
  Downloading six-1.10.0-py2.py3-none-any.whl
Collecting traceback2==1.4.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 159))
  Downloading traceback2-1.4.0-py2.py3-none-any.whl
Collecting unittest2==1.1.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 162))
  Downloading unittest2-1.1.0-py2.py3-none-any.whl (96kB)
Collecting zope.component==4.2.2 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 165))
  Downloading zope.component-4.2.2.tar.gz (546kB)
Collecting zope.event==4.1.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 167))
  Downloading zope.event-4.1.0.tar.gz (476kB)
Collecting zope.interface==4.1.3 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 169))
  Downloading zope.interface-4.1.3.tar.gz (141kB)
Collecting mock==2.0.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 187))
  Downloading mock-2.0.0-py2.py3-none-any.whl (56kB)
Collecting letsencrypt==0.7.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 198))
  Downloading letsencrypt-0.7.0-py2-none-any.whl
Collecting certbot==0.19.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 202))
  Downloading certbot-0.19.0-py2.py3-none-any.whl (279kB)
Collecting acme==0.19.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 205))
  Downloading acme-0.19.0-py2.py3-none-any.whl (99kB)
Collecting certbot-apache==0.19.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 208))
  Downloading certbot_apache-0.19.0-py2.py3-none-any.whl (141kB)
Collecting certbot-nginx==0.19.0 (from -r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 211))
  Downloading certbot_nginx-0.19.0-py2.py3-none-any.whl (65kB)
Requirement already satisfied: setuptools in /opt/eff.org/certbot/venv/lib/python2.7/site-packages (from zope.component==4.2.2->-r /tmp/tmp.BwSUX02mT7/letsencrypt-auto-requirements.txt (line 165))
Installing collected packages: argparse, pycparser, asn1crypto, cffi, ConfigArgParse, six, configobj, idna, enum34, ipaddress, cryptography, funcsigs, linecache2, ordereddict, pyparsing, packaging, parsedatetime, pbr, pyOpenSSL, pytz, pyRFC3339, python-augeas, requests, traceback2, unittest2, zope.interface, zope.event, zope.component, mock, acme, certbot, letsencrypt, certbot-apache, certbot-nginx
  Found existing installation: argparse 1.2.1
    Not uninstalling argparse at /usr/lib/python2.7, outside environment /opt/eff.org/certbot/venv
  Running setup.py install for pycparser: started
    Running setup.py install for pycparser: finished with status 'done'
  Running setup.py install for cffi: started
    Running setup.py install for cffi: finished with status 'error'
    Complete output from command /opt/eff.org/certbot/venv/bin/python2.7 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-qToB2P/cffi/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('
', '
');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-kRuwQ_-record/install-record.txt --single-version-externally-managed --compile --install-headers /opt/eff.org/certbot/venv/include/site/python2.7/cffi:
    /usr/bin/ld: cannot find crt1.o: No such file or directory
    /usr/bin/ld: cannot find crti.o: No such file or directory
    collect2: error: ld returned 1 exit status
    Note: will not use '__sync_synchronize()' in the C code
    ***** The above error message can be safely ignored.

    running install
    running build
    running build_py
    creating build
    creating build/lib.linux-armv7l-2.7
    creating build/lib.linux-armv7l-2.7/cffi
    copying cffi/cffi_opcode.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/error.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/setuptools_ext.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/ffiplatform.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/cparser.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/vengine_cpy.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/__init__.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/verifier.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/commontypes.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/api.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/backend_ctypes.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/recompiler.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/model.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/lock.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/vengine_gen.py -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/_cffi_include.h -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/parse_c_type.h -> build/lib.linux-armv7l-2.7/cffi
    copying cffi/_embedding.h -> build/lib.linux-armv7l-2.7/cffi
    running build_ext
    building '_cffi_backend' extension
    creating build/temp.linux-armv7l-2.7
    creating build/temp.linux-armv7l-2.7/c
    arm-linux-gnueabi-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -fPIC -DUSE__THREAD -I/usr/include/ffi -I/usr/include/libffi -I/usr/include/python2.7 -c c/_cffi_backend.c -o build/temp.linux-armv7l-2.7/c/_cffi_backend.o
    c/_cffi_backend.c:2:20: fatal error: Python.h: No such file or directory
     #include <Python.h>
                        ^
    compilation terminated.
    error: command 'arm-linux-gnueabi-gcc' failed with exit status 1

    ----------------------------------------
Command "/opt/eff.org/certbot/venv/bin/python2.7 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-qToB2P/cffi/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('
', '
');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-kRuwQ_-record/install-record.txt --single-version-externally-managed --compile --install-headers /opt/eff.org/certbot/venv/include/site/python2.7/cffi" failed with error code 1 in /tmp/pip-build-qToB2P/cffi/
=====================================================

Certbot has problem setting up the virtual environment.

We were not be able to guess the right solution from your pip
output.

Consult https://certbot.eff.org/docs/install.html#problems-with-python-virtual-environment
for possible solutions.
You may also find some support resources at https://certbot.eff.org/support/ .

Any suggestion?