我已经使用pip在我的virtualenv中安装了matplotlib。刚开始时是失败的，但是我这样做之后easy_install -Udistribute，安装顺利进行。

这是我的工作（在我的git仓库根文件夹中）：

virtualenv env
source env/bin/activate
pip install gunicorn
pip install numpy
easy_install -U distribute
pip install matplotlib

然后，我通过使用制作了requirements.txt pip freeze > requirements.txt。结果如下：

argparse==1.2.1
distribute==0.7.3
gunicorn==17.5
matplotlib==1.3.0
nose==1.3.0
numpy==1.7.1
pyparsing==2.0.1
python-dateutil==2.1
six==1.3.0
tornado==3.1
wsgiref==0.1.2

当我尝试部署应用程序时发生了问题：

(env)gofrendi@kirinThor:~/kokoropy$ git push -u heroku
Counting objects: 9, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (5/5), done.
Writing objects: 100% (5/5), 586 bytes, done.
Total 5 (delta 3), reused 0 (delta 0)

-----> Python app detected
-----> No runtime.txt provided; assuming python-2.7.4.
-----> Using Python runtime (python-2.7.4)
-----> Installing dependencies using Pip (1.3.1)
       Downloading/unpacking distribute==0.7.3 (from -r requirements.txt (line 2))
         Running setup.py egg_info for package distribute

       Downloading/unpacking matplotlib==1.3.0 (from -r requirements.txt (line 4))
         Running setup.py egg_info for package matplotlib
           The required version of distribute (>=0.6.28) is not available,
           and can't be installed while this script is running. Please
           install a more recent version first, using
           'easy_install -U distribute'.

           (Currently using distribute 0.6.24 (/app/.heroku/python/lib/python2.7/site-packages))
           Complete output from command python setup.py egg_info:
           The required version of distribute (>=0.6.28) is not available,

       and can't be installed while this script is running. Please

       install a more recent version first, using

       'easy_install -U distribute'.



       (Currently using distribute 0.6.24 (/app/.heroku/python/lib/python2.7/site-packages))

       ----------------------------------------
       Command python setup.py egg_info failed with error code 2 in /tmp/pip-build-u55833/matplotlib
       Storing complete log in /app/.pip/pip.log

 !     Push rejected, failed to compile Python app

To git@heroku.com:kokoropy.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git@heroku.com:kokoropy.git'
(env)gofrendi@kirinThor:~/kokoropy$

似乎heroku服务器无法正确安装matplotlib。

当我这样做时easy_install -U distribute，可能不会被点子记录。

Matplotlib也具有几个非python库依赖（例如：libjpeg8-dev，libfreetype和libpng6-dev）。我可以在本地安装这些依赖项（例如：通过apt- get）。但是，这也不会被pip记录。

所以，我的问题是：如何在heroku部署服务器中正确安装matplotlib？