[ERROR] Could not install Python modules!

[graabein]

Hello

I just tried your script on Ubuntu Server 14.04. It went well for a while, but then halted with the following error message:

Downloading/unpacking lxml
Downloading lxml-3.4.1.tar.gz (3.5MB): 3.5MB downloaded
Running setup.py (path:/home/graabein/mybooktype/build/lxml/setup.py) egg_info for package lxml
/usr/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'
warnings.warn(msg)
Building lxml version 3.4.1.
Building without Cython.
Using build configuration of libxslt 1.1.28

warning: no previously-included files found matching '*.py'

Downloading/unpacking PIL
Could not find any downloads that satisfy the requirement PIL
Some externally hosted files were ignored (use --allow-external PIL to allow).
Cleaning up...
No distributions at all found for PIL
Storing debug log for failure in /home/graabein/.pip/pip.log

[ERROR] Could not install Python modules!

Any idea what I can do about this? I am a linux newbie, so please be a bit patient, I will learn :-)