Upgraded to 0.49 - "python setup.py egg_info" failed with error code -11

Installation
1

Hello,

I’m trying to install the latest version of HA, but the upgrade aways failing.
Error:

(homeassistant_venv) homeassistant@raspberrypi:/home/pi$ pip3 install --upgrade homeassistant
Collecting homeassistant
  Downloading homeassistant-0.49.0-py2.py3-none-any.whl (7.2MB)
    100% |████████████████████████████████| 7.2MB 7.3MB/s
Requirement already up-to-date: pip>=7.1.0 in /srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages (from homeassistant)
Requirement already up-to-date: astral==1.4 in /srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages (from homeassistant)
Requirement already up-to-date: requests==2.14.2 in /srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages (from homeassistant)
Collecting chardet==3.0.4 (from homeassistant)
  Downloading chardet-3.0.4-py2.py3-none-any.whl (133kB)
    100% |████████████████████████████████| 143kB 562kB/s
Collecting aiohttp==2.2.3 (from homeassistant)
  Downloading aiohttp-2.2.3.tar.gz (787kB)
    100% |████████████████████████████████| 788kB 649kB/s
    Complete output from command python setup.py egg_info:

    ----------------------------------------
Command "python setup.py egg_info" failed with error code -11 in /tmp/pip-build-f_thn_v0/aiohttp/

Any ideas ?