I'm trying to use Python's spynner module in a Heroku app, but I'm having trouble getting it working on Heroku.  I obviously have it in my requirements.txt and that's fine, even installing lxml with no problem, but I run into a problem with PyQt4.  It's not listed in its dependencies, and if I manually put a statement in the requirements.txt like pyqt>=0.0.0, it does try to install it, but I always end up with the following error:
       Downloading/unpacking pyqt>=0.0.0 (from -r requirements.txt (line 12))
         Storing download in cache at /app/tmp/repo.git/.cache/pip_downloads/htt
p%3A%2F%2Fwww.riverbankcomputing.com%2Fstatic%2FDownloads%2FPyQt4%2FPyQt-x11-gpl
-4.9.4.tar.gz
         Running setup.py egg_info for package pyqt
           Traceback (most recent call last):
             File "<string>", line 14, in <module>
           IOError: [Errno 2] No such file or directory: '/tmp/build_11i9jfrncqa
t2/.heroku/venv/build/pyqt/setup.py'
           Complete output from command python setup.py egg_info:
           Traceback (most recent call last):
         File "<string>", line 14, in <module>
       IOError: [Errno 2] No such file or directory: '/tmp/build_11i9jfrncqat2/.
heroku/venv/build/pyqt/setup.py'
       ----------------------------------------
       Command python setup.py egg_info failed with error code 1 in /tmp/build_1
1i9jfrncqat2/.heroku/venv/build/pyqt
       Storing complete log in /app/.pip/pip.log
 !     Heroku push rejected, failed to compile Python app
No matter what I do, even trying manual heroku run easy_install xxx with some PyQt4 distribution, it never works.  Does anyone have any advice on how to get spynner running?