Hi Kacper (and yt-users), Thanks for your response! I should have been more clear and said that I've only been using the yt install script to do everything, and was surprised that libimf.so wasn't compiled. The full text of my error is: (yt-x86_64)gpc-f101n084-$ ipython Traceback (most recent call last): File "/home/m/mhvk/czhu/yt-x86_64/bin/ipython", line 5, in <module> from IPython.frontend.terminal.ipapp import launch_new_instance File "/home/m/mhvk/czhu/yt-x86_64/lib/python2.7/site-packages/IPython/__init__.py", line 43, in <module> from .config.loader import Config File "/home/m/mhvk/czhu/yt-x86_64/lib/python2.7/site-packages/IPython/config/__init__.py", line 16, in <module> from .application import * File "/home/m/mhvk/czhu/yt-x86_64/lib/python2.7/site-packages/IPython/config/application.py", line 22, in <module> import logging File "/home/m/mhvk/czhu/yt-x86_64/lib/python2.7/logging/__init__.py", line 26, in <module> import sys, os, time, cStringIO, traceback, warnings, weakref ImportError: libimf.so: cannot open shared object file: No such file or directory Best, Charles P.S. I wrote a meaningless "(though )" in my last e-mail, which was supposed to report that installing ZeroMQ using install_script.bash gives the error "stream_engine.hpp(97): error #82: storage class is not first const static size_t greeting_size = 12" which I had to manually fix in the source to "static const", and then rerun install_script.bash.