no luck newbie at home assistant

[peterkexas]

2017-08-29 22:15:18 ERROR (Thread-7) [homeassistant.util.package] Unable to install package python-miio==0.0.8: Command "/srv/homeassistant/bin/python3 -u -c "import setuptools, tokenize;file='/tmp/pip-build-lee1z2zz/cffi/setup.py';f=getattr(tokenize, 'open', open)(file);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, file, 'exec'))" install --record /tmp/pip-hy8jzexv-record/install-record.txt --single-version-externally-managed --compile --install-headers /srv/homeassistant/include/site/python3.4/cffi" failed with error code 1 in /tmp/pip-build-lee1z2zz/cffi/
2017-08-29 22:15:18 ERROR (MainThread) [homeassistant.setup] Not initializing switch.chuangmi_ir because could not install dependency python-miio==0.0.8
2017-08-29 22:15:18 ERROR (MainThread) [homeassistant.setup] Unable to prepare setup for platform switch.chuangmi_ir: Could not install all requirements.

my rpi has hassbian updated 0.52.1
please help!!

[syssi]

There is a dependency missing. sudo apt-get install libffi-dev will solve the issue.

[peterkexas]

I did it but nothing again