How can I Configure linter-flake8 on Atom?

I'm trying to configure linter-flake8 for python on Atom editor. I used pip install flake8 and it installed flake8 on ~/.local/bin/.I put it on my PATH and add this line on my coffee.init file:

process.env.PATH = ['~/.local/bin', process.env.PATH].join(':')

But still every time I use Atom I get this error:

Error: spawn flake8 ENOENT

Anyone has any idea how to fix this?

Thanks a lot!