I am trying to install yt on Pleiades. I was able to complete a number installation steps but I eventually got an error message related to Cython (Cython seems to be installed though). The error message is attached below. Does anybody have an idea what needs to be done to complete this installation? 


Dr. Mateusz Ruszkowski
Associate Professor

University of Michigan 
Department of Astronomy
301C West Hall
1085 South University Ave. 
Ann Arbor, MI 48109-1107, USA

e-mail: mateuszr@umich.edu


% module load pkgsrc/2014Q3
% module load python/2.7.9
% hg clone https://bitbucket.org/yt_analysis/yt
warning: bitbucket.org certificate with fingerprint 46:de:34:e7:9b:18:cd:7f:ae:fd:8b:e3:bc:f4:1a:5e:38:d7:ac:24 not verified (check hostfingerprints or web.cacerts config setting)
destination directory: yt
requesting all changes
adding changesets
adding manifests
adding file changes
added 17568 changesets with 36510 changes to 3053 files (+3 heads)
updating to bookmark @ on branch stable
1209 files updated, 0 files merged, 0 files removed, 0 files unresolved
% cd yt
% hg update yt
317 files updated, 0 files merged, 148 files removed, 0 files unresolved
(leaving bookmark @)
% python setup.py install --user --prefix=/nobackupnfs2/mruszkow
Cython is a build-time requirement for the source tree of yt.
Please either install yt from a provided, release tarball,
or install Cython (version 0.22 or higher).
You may be able to accomplish this by typing:
     pip install -U Cython
% pip install -U Cython
Downloading/unpacking Cython from https://pypi.python.org/packages/source/C/Cython/Cython-0.23.4.tar.gz#md5=157df1f69bcec6b56fd97e0f2e057f6e
  Downloading Cython-0.23.4.tar.gz (1.6MB): 1.6MB downloaded
  Running setup.py (path:/tmp/pip_build_mruszkow/Cython/setup.py) egg_info for package Cython
    Unable to find pgen, not compiling formal grammar.
    warning: no files found matching '*.pyx' under directory 'Cython/Debugger/Tests'
    warning: no files found matching '*.pxd' under directory 'Cython/Debugger/Tests'
    warning: no files found matching '*.h' under directory 'Cython/Debugger/Tests'
    warning: no files found matching '*.pxd' under directory 'Cython/Utility'
Installing collected packages: Cython
  Found existing installation: Cython 0.21.1
    Uninstalling Cython:
Cleaning up...
Traceback (most recent call last):
  File "/nasa/pkgsrc/2014Q4/lib/python2.7/site-packages/pip/basecommand.py", line 122, in main
    status = self.run(options, args)
  File "/nasa/pkgsrc/2014Q4/lib/python2.7/site-packages/pip/commands/install.py", line 283, in run
    requirement_set.install(install_options, global_options, root=options.root_path)
  File "/nasa/pkgsrc/2014Q4/lib/python2.7/site-packages/pip/req.py", line 1431, in install
  File "/nasa/pkgsrc/2014Q4/lib/python2.7/site-packages/pip/req.py", line 598, in uninstall
  File "/nasa/pkgsrc/2014Q4/lib/python2.7/site-packages/pip/req.py", line 1836, in remove
    renames(path, new_path)
  File "/nasa/pkgsrc/2014Q4/lib/python2.7/site-packages/pip/util.py", line 295, in renames
    shutil.move(old, new)
  File "/nasa/pkgsrc/2014Q4/lib/python2.7/shutil.py", line 300, in move
  File "/nasa/pkgsrc/2014Q4/lib/python2.7/shutil.py", line 247, in rmtree
    rmtree(fullname, ignore_errors, onerror)
  File "/nasa/pkgsrc/2014Q4/lib/python2.7/shutil.py", line 252, in rmtree
    onerror(os.remove, fullname, sys.exc_info())
  File "/nasa/pkgsrc/2014Q4/lib/python2.7/shutil.py", line 250, in rmtree
OSError: [Errno 30] Read-only file system: '/nasa/pkgsrc/2014Q4/lib/python2.7/site-packages/Cython/Build/BuildExecutable.py'

Storing debug log for failure in /u/mruszkow/.pip/pip.log