Hi all, I'm having a problem similar to what Sam ran into using bootstrap_dev, found here: http://lists.spacepope.org/htdig.cgi/yt-users-spacepope.org/2011-June/001679... Even with a pretty pristine yt install, neither pip nor easy_install successfully install the lxml pacakge. Thanks! chris 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.