title: Why do I get an error when installing Pillow 3.0.0 on Ubuntu?
body: <p>I recently failed trying to install Pillow 3.0.0 on my Ubuntu 14.04.</p>
  
  <p>No matter what I do (download and try to <code>sudo python setup.py install</code> or <code>sudo -H pip install Pillow==3.0.0 --no-cache-dir</code>) every time I get error:</p>
  
  <pre><code>    Traceback (most recent call last):
        File "&lt;string&gt;", line 1, in &lt;module&gt;
        File "/tmp/pip-build-3waMkf/Pillow/setup.py", line 767, in &lt;module&gt;
          zip_safe=not debug_build(),
        File "/usr/lib/python2.7/distutils/core.py", line 151, in setup
          dist.run_commands()
        File "/usr/lib/python2.7/distutils/dist.py", line 953, in run_commands
          self.run_command(cmd)
        File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
          cmd_obj.run()
        File "/usr/local/lib/python2.7/dist-packages/setuptools/command/install.py", line 61, in run
          return orig.install.run(self)
        File "/usr/lib/python2.7/distutils/command/install.py", line 601, in run
          self.run_command('build')
        File "/usr/lib/python2.7/distutils/cmd.py", line 326, in run_command
          self.distribution.run_command(command)
        File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
          cmd_obj.run()
        File "/usr/lib/python2.7/distutils/command/build.py", line 128, in run
          self.run_command(cmd_name)
        File "/usr/lib/python2.7/distutils/cmd.py", line 326, in run_command
          self.distribution.run_command(command)
        File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
          cmd_obj.run()
        File "/usr/lib/python2.7/distutils/command/build_ext.py", line 337, in run
          self.build_extensions()
        File "/tmp/pip-build-3waMkf/Pillow/setup.py", line 515, in build_extensions
          % (f, f))
      ValueError: --enable-zlib requested but zlib not found, aborting.
  
      ----------------------------------------
  Command "/usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build-3waMkf/Pillow/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-S_sHo7-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-3waMkf/Pillow
  </code></pre>