Currently I'm installing PIL into my virtual env as follows:

```
pip install -E . -r ./releases/%s/requirements.txt

```

where requirements.txt contains:

```
pil

```

I can upload png images but not jpeg images currently. From reading on the web it seems i may need libjpeg decoder? Am i installing pil incorrectly? What is the proper way to install pil for django in a virtual env with libjpeg?