I just received a similar error trying to install the development version of yt using the install script on Titan. It looks like the src/yt-hg/ directory had not been created at all.

Max Katz
Ph.D. Candidate, Department of Physics and Astronomy
Stony Brook University
http://astro.sunysb.edu/mkatz/

On Mon, Sep 14, 2015 at 9:17 AM, Muhammad Latif <latifne@gmail.com> wrote:
Hi all,
I'm getting the following error while installing yt-3.2.1 latest release. Any idea what is going on here?
thanks in advance,
cheers
Latif

Installing nose-1.3.6
Installing python-hglib-1.6
Installing sympy-0.7.6
Doing yt update, wiping local changes and updating to branch stable
install_script.sh: line 1025: cd: /home/latif/YT/yt-x86_64/src/yt-hg/: No such file or directory
Installing yt
********************************************
        FAILURE REPORT:
********************************************

running install_data
copying doc/man/isympy.1 -> /home/latif/YT/yt-x86_64/share/man/man1
running install_egg_info
Writing /home/latif/YT/yt-x86_64/lib/python2.7/site-packages/sympy-0.7.6-py2.7.egg-info
Collecting jinja2
  Using cached Jinja2-2.8-py2.py3-none-any.whl
Collecting MarkupSafe (from jinja2)
Installing collected packages: MarkupSafe, jinja2
Successfully installed MarkupSafe-0.23 jinja2-2.8
/home/latif/YT/yt-x86_64/bin/python2.7: can't open file 'setup.py': [Errno 2] No such file or directory

********************************************
********************************************
Failure.  Check /home/latif/YT/yt-x86_64/yt_install.log.  The last 10 lines are above.

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