# Error during dependency installation

**URL:** <https://community.letsencrypt.org/t/error-during-dependency-installation/4048>\
**Category:** Help\
**Created:** [November 17, 2015, 9:13pm UTC](https://community.letsencrypt.org/t/error-during-dependency-installation/4048 "2015-11-17T21:13:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![bsalarius](https://avatars.discourse-cdn.com/v4/letter/b/9fc29f/32.png) [@bsalarius](https://community.letsencrypt.org/u/bsalarius)\
**Post date:** [November 17, 2015, 9:13pm UTC](https://community.letsencrypt.org/t/error-during-dependency-installation/4048/1 "2015-11-17T21:13:09Z")

</div>

I was just invited to the beta program for Let’s Encrypt, so I downloaded the client and ran it, only to produce the following error.

```
Updating letsencrypt and virtual environment dependencies......
Command "/root/.local/share/letsencrypt/bin/python2 -c "import setuptools, tokenize; __file__ ='/tmp/pip-build-nvyhhx/cffi/setup.py';exec(compile(getattr(tokenize, 'open', open)( __file__ ).read().replace('\r\n', '\n'), __file__ , 'exec'))" install --record /tmp/pip-qcnQJh-record/install-record.txt --single-version-externally-managed --compile --install-headers /root/.local/share/letsencrypt/include/site/python2.6/cffi" failed with error code 1 in /tmp/pip-build-nvyhhx/cffi

```

I have had no luck on Google so far…  
Any help would be appreciated!