AMI zope errors related to PYTHON_INSTALL_LAYOUT

```

       __|  __|_  )
       _|  (     /   Amazon Linux AMI
      ___|\___|___|

https://aws.amazon.com/amazon-linux-ami/2016.03-release-notes/
```

```
./letsencrypt-auto certonly --standalone --email www@icocoa.me -d icocoa.me -d www.icocoa.me --debug
Checking for new version...
Creating virtual environment...
Installing Python packages...
Installation succeeded.
Requesting root privileges to run letsencrypt...
   sudo /home/ec2-user/.local/share/letsencrypt/bin/letsencrypt certonly --standalone --email www@icocoa.me -d icocoa.me -d www.icocoa.me --debug
Traceback (most recent call last):
  File "/home/ec2-user/.local/share/letsencrypt/bin/letsencrypt", line 7, in <module>
    from letsencrypt.main import main
  File "/home/ec2-user/.local/share/letsencrypt/local/lib/python2.7/dist-packages/letsencrypt/main.py", line 11, in <module>
    import zope.component
  File "/home/ec2-user/.local/share/letsencrypt/local/lib/python2.7/dist-packages/zope/component/__init__.py", line 16, in <module>
    from zope.interface import Interface
ImportError: No module named interface
```

```
/home/ec2-user/.local/share/letsencrypt/bin/pip install zope.interface interface
Collecting zope.interface
Collecting interface
Requirement already satisfied (use --upgrade to upgrade): setuptools in /home/ec2-user/.local/share/letsencrypt/lib/python2.7/dist-packages (from zope.interface)
Collecting zope.schema (from interface)
Requirement already satisfied (use --upgrade to upgrade): zope.event in /home/ec2-user/.local/share/letsencrypt/lib/python2.7/dist-packages (from zope.schema->interface)
Installing collected packages: zope.interface, zope.schema, interface
Successfully installed interface zope.interface zope.schema-4.4.2
You are using pip version 8.0.3, however version 8.1.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
```

```
/home/ec2-user/.local/share/letsencrypt/bin/python
Python 2.7.10 (default, Dec  8 2015, 18:25:23)
[GCC 4.8.3 20140911 (Red Hat 4.8.3-9)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from zope.interface import Interface
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named interface
```

master branch 9d7519ca25684b81455696ceea2a22bc94ca8862

[
  {
    "category": "misspecification",
    "rule": "signature.unresolvable_declared_requirement",
    "source": "failure_signature",
    "excerpt": "ERROR: No matching distribution found for acme==0.6.0.dev0"
  }
]