Even with a pretty pristine yt install, neither pip nor easy_install successfully install the lxml pacakge.
error log:
creating build/temp.linux-x86_64-2.7/src/lxml
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/zdata/cemoody/code/yt-chasm/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.linux-x86_64-2.7/src/lxml/lxml.etree.o -w
In file included from src/lxml/lxml.etree.c:239:0:
src/lxml/etree_defs.h:9:31: fatal error: libxml/xmlversion.h: No such file or directory
compilation terminated.
error: command 'gcc' failed with exit status 1
----------------------------------------
Command /zdata/cemoody/code/yt-chasm/bin/python2.7 -c "import setuptools;__file__='/zdata/cemoody/code/yt-chasm/build/lxml/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-r32BZP-record/install-record.txt failed with error code 1
Storing complete log in /home/cemoody/.pip/pip.log
Unable to install lxml. Please report this bug to yt-users.